Literally the first link in Google when you type HDMI 2.0b shows you up... Yet you went digging for something for your FUD campaign. The best you could come up with was a years old article, written in French, regarding a completely different piece of hardware. I've no wish to sue you, or cause you any harm, but for once it would behove you to admit your mistakes and apologise to those who you have aggressively belittled for having the gall to disagree with your opinion.
Anyway, lets post their far more up to date numbers, based on a test that does not used the AMD sponsored and assisted developers canned test and/or scenes.
So on one hand we have a set of results taken from when the game first launched. Using a test run and scenes specifically chosen by the developer who has had sponsorship and technical assistance from AMD. On the other a set of results taken far more recently, with drivers that have had time to be optimised and from a scene not chosen by the developer for specific reasons.
I'll let others make of those as they will, rather than aggressively trying to lead them to a specific conclusion.