According to Nintendo Magazine editor Steve Hogarty the framerate in the retail game remains unimproved.
Source
For those of you who haven't played the demo, the framerate often drops below 30fps, especially during cut scenes and that's without 4x AA or 3D.
This is sad really since it doesn't got anything to do with the the system's capabilities, something I can say with confidence after playing Resident Evil: Revelations,
a game which doesn't always takes place in small environments, or with small numbers of enemies displayed as many seems to think
and no I'm not talking about the mountain area.