Here are some examples:
I've been shooting a variety of photos with 7d 5dii and iii and the 7d while a good tracking and focusing camera, has not lived up to my expectations of improving reach because the files don't stand up to any cropping because of high noise and what I think is just poor iso performance. Even uncropped files look fuzzy. I've included files from DPP of clouds (since they are at infinity focus to take poor focusing out of equation), but virtually all the photos show the same graininess and I think that is keeping them from attaining sharpness, really at any iso. The metadata should be right nest to the photos to show the iso and other information.
So is this normal or outside of normal for a 7d, and what should I do bought the camera about 6 months ago.
A couple things I see in your samples. For one, your shooting at a VERY narrow aperture of f/13. That is not only beyond the sensor DLA of f/6.9, but its well beyond what you could possibly need to get enough DOF to encompass a bird, especially at such distances. You could probably open the aperture up to f/7.1 or f/6.3, which would be some two stops faster, allowing you to reduce your ISO setting to ISO 200 or less (barring a couple caveats.)
One thing to be aware of with the 7D (and Canon sensors in general) is that, unlike Sony Exmor sensors which have a constant and very low noise floor, electronic (read) noise increases at the fastest few ISO settings. At ISO 200 its about double the average at higher settings, and at ISO 100 its about quadruple the average at higher settings. That means that using an ISO setting lower than ISO 320 isn't really going to do as much as you might think from a noise standpoint.
Another key factor in your samples is the fact that the sky is primarily blue. Only 1/4 of the pixels in the 7D sensor are blue, or 50% relative to green. That means blue pixels (and red pixels) need to be amplified more than green pixels to produce the same average luminance...and that has the side effect of increasing noise. Silicon is also naturally less sensitive to blue light than it is to green, both of which it is less sensitive to than red. As such, blue needs the most amplification of all three colors, so its generally the noisiest channel. (Intriguingly, our biological eyes have a similar issue, which is partly why we have blue cones spread over a 10° area of our fovea, where as red and green cones are clustered in a 2° area.) Sky tends to be noisy on all sensors, especially at higher ISO settings (in Canon cameras, ISO 640 is really ISO 800 with what is effectively a -1/3rd stop pull).
Finally, the 7D has a very high density sensor with a moderate pixel pitch, which means it is more susceptible to the random nature of light than larger sensor with a large pixel pitch. The Canon 30D had a 6.4 micron pixel pitch, almost as large as the 5D III, which means each pixel is capable of capturing 50% more light than the 4.3 micron pixels in the 7D. That has the effect of normalizing photon shot noise in the 30D.
All of these factors add up to more visible noise in the 7D, particularly in the blue channel...so a blue sky is going to be particularly affected (which is nothing special...that happens to all cameras, just to a slightly greater degree in the 7D). On the flip side, the 7D has over a 2x resolution advantage over the 30D. If you downscale a 7D image to 30D size with an effective scaling algorithm, the 7D image should actually look better than the 30D image. Additionally, since the 7D produces images more than twice the size of the 30D, you should be resolving considerably more fine detail. On a normalized scale the 7D actually has a noise advantage, and on a native scale the 7D has a resolution advantage, despite the noise handicap. You could scale down the 7D images to 16.4mp (twice the size of a 30D image), and still produce better results than the 30D. You won't eliminate all of the additional noise, but you can certainly improve things...and a little bit of extra NR in post with RAW can produce far superior results to anything the 30D could produce even with considerable post processing.
One thing to be aware of when it comes to Canon sensors is that once you get above ISO 1600 (possibly excepting the 5D III and the 1D X, as they have much greater ISO leeway than any previous Canon sensor), the amplification algorithm becomes fairly complex. ISO 3200+ involves analog amplification to ISO 1600, as well as several other analog and digital forms of amplification to get to the selected ISO setting. The top two ISO settings on Canon cameras tend to be considerably noisy, more so than one would expect if each ISO setting was amplified on a simple linear curve. I use ISO 3200 far more often than I would prefer on my 7D, however I prefer to stay at ISO 1600 or lower, as the results are far better. Unless you are working with extremely low light and need a high shutter speed, I recommend avoiding ISO 2000 and ISO 3200+.