i have a 50D and i am not pissed or urked off.
i bought the 50D - nobody twisted my arm except my evil twin that is inviable.
from the CMOS side, i would not be surprised that the 7D is a new node as compared to the 50D/5Dmkii as far as the gapless microlens and photodiode.
The 50D/5Dmkii being same node but different die size. bigger die size would have different electrical constraint and performance issues.
actually i can see several revisions 50D then 5Dmkii and now the 7D.
just my 2 cents....