Is that really a tick in the "win" column for GT5, though? Wipers tear massively, rain looks terrible and snow looks even worse. Don't get me wrong, I've said plenty of times that I agree that next gen, PD's visual effects [should] look incredible, but I'm not sure that on PS3 and GT5 it's something to say "Look! We included all these effects! Sure, it impacts performance and they look terrible, but ignore that..."
Of the effects, only night racing looks incredible (and it really does). I'm sure they could have saved rain/snow for next gen when they could have delivered them as they would have intended, without introducing new problems i.e. constant wiper tearing. Why the wipers to tear like they do I've not seen any explanation as they seem to tear individually. Still distracting as hell though.