Actually i provided 4 instances of large performance differences in BioShock, not 1, so i'm not just basing it off just one.
As for your PCHarware slides, they show the same level of results i did, its hardly surprising to me, its a small difference simply confirming what i found and reported, it doesn't change the large performance discrepancies between the two BioShock, i had the same results, it did not translate.
Your repeating the same thing again, only this time as a huge wall of text, which i did read.
Prove me wrong, don't repeat the same thing over and over again getting more and more elaborate each time.
Actually prove there my results as inaccurate, less talk more doing.
I've already proven your 30% theory is a loaf of guff, The difference is roughly 15% fps. Your four links do not have the 15.15 drivers on both 290s and 390's. Just because your results didn't provide gains doesn't mean that there aren't other factors involved.
All your results provide is no gain from your 290 but it's not running the same clocks as a r9 390/390x and you're not running a 390/390 in your system to compare.
Until someone owns both and could do a back to back test then it's still theory.
You were trying to claim the grenada was gcn 1.2 first of all, sugarhell provided a link to show that the 290x almost scales to the same tesselation as a 390x on 15.15 so it's not gcn 1.2.