I think VGC does a great job, but I have a hard time to believe this. It is always hard to say something like this without getting flamed or banned, but I will give it a shot.
The main tracking services like NPD, chart-track and Media Create are not showing this shift in sales.
NPD for US only really showed that Xbox 360 sells a lot of software. Bioshock 2 just topped the charts last month for example. Chart-track reported some strong Xbox 360 sales as well. Sure MAG, FFXIII and Heavy Rain had decent to good sales on the PS3, too. Media Create for Japanese sales is easy. But except the relaunch of RE 5, Star Ocean and RoF, there was no really big PS3 game in Japan this year. And those three combined sold like 400k this year.
Looking at worldwide sales for the PS3 software (especially older and smaller games) makes me wonder.
- GTA IV PS3 outsold Xbox 360 version 2:1 last week
- Madden NFL 10 PS3 outsold Xbox 360 version almost 3:1 (this game is basically US only)
- Sonics ultimate Genesis collection PS3 outsold Xbox 360 version almost 3:1
- UFC 2009 undisputed PS3 outsold Xbox 360 version 2:1
- Sega Allstar Racing PS3 outsold Xbox 360 version even though the Xbox 360 version has exclusive content
- Need for Speed shift sold 11k and was not even in the charts for Xbox 360, so at least 2:1
- Army of Two the 40th day PS3 outsold Xbox 360 almost 2:1 last week (The first one is still on the charts but only for the PS3)
- Red Faction Guerrilla is on the charts again for PS3 only.
- Same for CoD WaW and Dead Space.
I have no doubts that MAG, FF, Heavy Rain sold well, but I doubt that the older games sell way better on PS3 suddenly. especially with no tracking service confirming this in any way. And I doubt that Games on Demand is that big on Xbox 360 that it could eat so many retail-sales of the older games.