You're not understanding what I said at all. It isn't bombing because performance hasn't regressed. I did say however, that Kepler needs careful optimization from the driver to perform at max efficiency. These optimizations are still happening, just not always at launch time, much like AMD's cards.
I think the only way to compare if it's regressing in performance is having something to compare it to. It's all relative. You have to compare it something. You can't say performance hasn't regressed. It hasn't regressed in comparison to what? You can say that performance has regressed relatively to its AMD counterpart. The numbers are don't lie.
Compared to the competition, it isn't nearly as competitive. It might be due to better AMD driver optimization, and/or lack of Nvidia's driver optimization. Regardless, one thing is clear, Kepler isn't as competitive as it once was when compared to its AMD counterpart in current games. In the end, Kepler just isn't keeping up as well as it once did. That's the bottomline.