Jay520 on 28 June 2011
Connections problems are probably due to so many people playing with free PSN(plus). The servers most likely were only prepared for people that actually paid for PSN(plus) or inFamous 2. I know I wouldn't be playing if it wasn't for the welcome back program.
Currently at 72 %. I'll probably wait until tomorrow because I've heard a few cases of YLOD on the Naughty Dog Forums.
