It could be that the 7d emphasis is more on speed then IQ ? I also found the 7d's center focus point - to get less tack sharp results then the "cheapi" t2i.
More likely the setup of the 7D which is the problem. I have 2 7D's are they are both spot on sharp.
I have heard from 7D owners about this softness and they have sent them back to Canon etc and still been soft. Then you hear they shoot in jpeg using the default settings and not sharpened them. Out of the box the 7D will always look soft. So a P&S convert will always be complaining about soft images.
So you are shooting with the 7D and what is your 7D built-in sharpnesssetting? Or do you sharpen your RAW photo afterwards?