At Manchester Comic Con where they're demoing this. Played it on 360 and the tearing is pretty bad as are the jaggies. Could be the set up but hmmmm. Seems good though. Day one.
Didn't notice any jaggies in the videos, and hdn assured us there's no tearing.
EDIT: I just noticed the E3 demo was done on PC, if your demo was played on 360, that might explain the jaggies.