In frame-rate we do equal out, however the shutterlag of the t2i is a lot slower and therefor a lot less practical for sports. IMO shutterlag has a much larger impact on your keeper-rate than the frame-rate does.
To be fair the 1DX seems to be the ultimate camera for me, however I'm still very happy with the one I got now
PS: I'd rather get 2 50D/40D's than 1 7D. I used it twice now and seen some results from a friend and it might be coincidence, but that thing has a very soft output. And I don't really like sharpening every single shot.

As for the 85mm focusing. At f1.2 the DOF is so shallow that you might prefer live-view anyway for most of your shots. Have fun