To respond to your post though, there is NO benefit to a 1 stop faster aperture on APS-C sensor vs full frame because they (more than) cancel each other out. You don't stop action any quicker at all, whatsoever, because remember the ISO is skewed too, so all you're doing is just turning up the ISO sensitivity in a roundabout way.Ok, Thanks. So, assuming similar generation sensors, an APS-C based camera at ISO 100 at 1/100s would have similar (maybe even worse) image quality to a FF camera at ISO 200 at 1/100s. Therefore no real speed benefit. You'd just have more MPs, which may o may not be important. Makes sense.
Although, we might still have to disagree on the conversion of apertures to 35mm equivalents. While converting the focal length to a 35mm equivalent makes sense (with the preponderance of different sensor sizes, it's good to have a commonly accepted way of understanding focal length), converting the aperture causes confusion. At the same focus distance, a 30.5mm f/2.8 on a G15 has essentially the same background blur and requires the same shutter speed as a 30.5mm f/2.8 lens on a 7D and a 30.5mm f/2.8 lens on a 1Dx. In other words, a 30.5mm f/2.8 lens doesn't change any of its attributes when the sensor changes in size. Therefore, there is no need to convert it to a 35mm equivalent. The 30.5mm f2/8 is already a 35mm equivalent for every exposure and depth of field measurement.