I agree, that's my best guess as well, I can't see them not having dual Digic whether 5+ or 6... That's a huge part of what made the 7d the 7d!They could pull it off with the Dual Digic 5plus.. that wouldn't be bad. Dual Digic 6 may be a screamer though! Looking forward to some Cr2 rumors!
They might use dual 5+ again this time, but I still have my hopes up for Digic 6.
A considerable delay on a model could mean they've put Digic 6 on it.
FWIW, I bet we're gonna be seing 2x 5+ on the 7dmk2, and digic 6 on the 70D.