Alot of users on xbox.com have been getting the freezing during certain loading sections. It seems some get them and some don't and the ones that do get them unfortunately seem to get in the same spot over and over again. Might read a lil over there and see what they affected users have been doing for a workaround (if they've found one).
Thank god I haven't ran into any (other than the coin lady glitch where I had to restart game/chapter to get).
BTW got only 3 SP achievements left