The problem though is AMD wasn't late to the party, the driver and cap and improved performance was available before the game was released.
[H] has used beta drivers loads of times in the past for both AMD and Nvidia:
'For the MSI GTX 580 Lightning 3GB video card we are using ForceWare 290.53 Beta.'
http://hardocp.com/article/2012/01/17/star_trek_online_dx11_performance_review/2
'NVIDIA - For all NVIDIA-based video cards in this evaluation, we are using ForceWare 290.36 BETA driver package, dated 28 November 2011. There is no increased performance or SLI profile for Serious Sam 3: BFE with this driver.'
http://hardocp.com/article/2011/12/21/serious_sam_3_bfe_performance_iq_review/2
That's just 2 out of the first 3 gaming IQ comparison tests performed at [H] using their search, that's why I highlighted my findings in my previous post.
Another point is why no MSAA tests?
If my 6950>70 CrossFire can run it@1080p, why can't the big boys run it@2560?