There is more to look at then the factor of things being "Up to Date".. in order for a video card to work right, you get drivers that "mature" it. Drivers work to "fix", "help" the video card go along.
Yes, Nvidia has had 6m to work on things.. But, how many months have ATI had a card out, to make a driver "mature" due to the factor of having, Millions, and I mean MILLIONS, of people to work out, and find, all the problems that the drivers have.
Now, if you really want to go and play hard ball.. driver wise on 9.12.. here's some ss to help you along.
As you can see from the SS, the "safer" drivers to have is the 9.12 drivers. Yes, they are not the most "mature" drivers, but they've made people feel Safe in the factor of using.
Also, you gotta look at the factor of this.. 10.3 became "official" as of March 24th.. A little over 2 days go.. W1z uses 25 benches to do his reviews. 5 tests for each.. 25x5=125. So, 125 benches he would have to redo in 2 days.. Did, some do it.. Yes.. Why? How? Because they probably don't have anything else to do but get that going.
W1zzard has more going on then just a "RELEASE" of a card. GPU-z gotta get a work out now. You got services that have to get going in order to get this new "series" going.. He's not here just to do a review. Not like some, probably most, sites have it going..
Just my 2 cents...