I just want to share my opinion in the shadows of the game....I'm not a game developer, I play a lot of video games...when I play PC games and I setting a game's shadows to high, the game's frame-rate drops significantly more than when I set the textures, effects, anything other than the shadows to high..... And in the case of GT5, we already see the details on the track and especially the premium cars, and seeing the shadows jagged doesn't really surprise me, its like the shadows are in "medium"....so making the shadows at settings like "high" for me would make the game 30FPS in my opinion...and Yamauchi already stated that he targets fluid 60fps...