The news is now up on dpreview with all of their usual samples, etc.
http://www.dpreview.com/previews/canon-eos-650d-rebel-t4i/From the front page of their preview:
The EOS 650D has a new 'Hybrid CMOS' sensor that now includes pixels dedicated to phase detection autofocus (in a similar fashion to Nikon's 1 J1 and 1 V1 mirrorless cameras). ... so either the 650D does have a new sensor or they're using it in new and different ways.
