we talked abput this before. Here is my post:
http://www.vgchartz.com/forum/post.php?post=3267819&page=1&postnum=42
I don't want to post all of this again. Have a look.
I still have my doubts for the western games that sell better on the PS3 right now. One year old games start selling on PS3 but not on 360 is strange. Especially with such a great difference for the userbase. Western games do not sell in Japan at all, so there is a 8 million gap in the west that only shrinks by 20k / week. So it is not like the PS3 gets a huge boost in the west and destroys the 360. That is not the case. Sure it outsells the 360 but not enough to say the difference in SW sales are from new PS3 owners that pick up old games. The Xbox 360 sees just a little less more new owners in the west.
I don't get why Madden starts selling better on PS3 all of a sudden. The game is basically US only and the PS3 gets outsold by the Xbox 360 in NA every week. The same things happen with the preorders. I don't get why madden 11 has a lot of more preorders in the US on PS3.
And there are no other sources than vgc that tell the same story.NPD reported great sales for Xbox 360 titles like Mass Effect 2, Call of Duty Modern Warfare 2 and Bioshock 2. The few EU numbers we get are mainly from UK and it is the same story there. Forza 3 is still top 12 and a lot of Xbox 360 games sold well.
*note* I don't say Heavy Rain, MAG and God of War did not sell great numbers. They sure did, but a lot of smaller or older titles selling better on PS3 now wihtout any reason is odd to me.