Mark Rein has responded to the recent rumors about UE3 on PS3 problems and UT3 running 60fps at GC in a forum post in which he states that, "Epic heard that same kind of silliness about UE3 on Xbox 360 before we shipped Gears of War and we all know how that turned out."
He continues to say that :
"The only way to silence the uninformed critics is to ship the games and let them play them for themselves. We're continually optimizing our engine on all supported platforms and we will continue to do so for several years into this generation. What we ship on PC and PS3 this fall will be considerably better than the builds we're showing here at Games Convention in every aspect."