Despite a common misconception, the PS3 is actually on par with the X360 in terms of sales by the end of their first year of release.
PS3: 5,552,074 sales
X360: 5,656,039 sales
Please note: If you consider VG Chartz 'inaccurate', its deviation of accuracy will be similar for all consoles.
Detailed chart after the jump.
Sorry about the jump everyone, it seems to be redirecting to the VG Chartz homepage.
Here's a direct link: http://vgchartz.com/hwlaunch.php