OK, this is news if it's true.
I found this news on gamed.nl and it linked to a forum on beyond3d.com.
The topic is full with technical terms I don't fully get but it sounds very reliable.
Here it is: (from http://forum.beyond3d.com/showthread.php?t=46242&page=23)
Poster1
So is it correct?
Ps3= 630P@2xAA(FP16?)
360=720P@2xAA(FP10)
Poster2
The facts come from research by our own Quaz51, so you're not going to find lnks anywhere. Quaz51 is the source that everyone else references! By looking at the framegrabs and analysing patterns of intensity around polygon edges, when you know what to look for it's possible to determine AA and upscaling amounts. If you really want to know the science of it, it'll be in one or other of these threads. In fact do a member search for Quaz51 and find his earliest posts, I think. And whether you care to know how it's done or not, the science and methods are accepted here as legitimate. It would be nice to have corroborating investigators, but even without that you can place your faith in the research and its findings.
Poster3
As far as I can remember, facts don't come in links. If you don't like Quaz's pixel-counting skills, please start doing the work yourself. Having said that, if you had followed the discussion you would know that resolution is only one of the factors that come into play here.