watch this video then u will understand about frame rates and latency
http://www.youtube.com/watch?v=REfb7qbUhC8
as u can see gt5 doesnt run no where near 60fps.
then watch this video of gt5 prologue
http://www.youtube.com/watch?v=kQGlbGaQd5g
as u can see gt5 prologue runs almost rock solid.
i just dont understand how prologue can run at a higher frame rate. also prolgue has 15 AI cars compared to 11 AI in gt5, shouldnt there be a gradual increase in performance through better understanding of the ps3 hardware?