Personally - and this is just my opinion - I'd look at low detail tests to see where the CPU bottlenecks lie as I think that even at medium levels, the 7970 is limiting performance.
It does highlight one significant piece of information - Piledriver and Bulldozer significantly outperform Stars here.
To the people asking for this card and that card, I think it's pretty easy to infer from the relative performances of the 7950 Boost, 670 and 7970 where the 680 and 7970 GHz Edition will lie.