Soldato
Then what is this?
Proof was given to you, but you chose to ignore it.
Let's take it one step at a time:
1. You have tests in which AMD is better on frame times (the big nvidia is better argument a while back) under DX and it only gets better under Mantle;
2. You have tests in which Mantle, frame rate wise, can go from 0% improvement to double digits numbers, even on high end setups. The empirical data is all there and it clearly shows under which situations Mantle kicks in and under which is not better. 'cause yeah, no one says it's better all the time. Even AMD said this API isn't required for all type of games. A lot are fine with how DX works.
On a ending note, showing a graph that puts 0 distance between the APIs and judging only by that is wrong, just as it's wrong to judge those API by another graph that shows Mantle way ahead. The subject has been discussed so much already, all the info is there. Don't get stuck on the details (and I'm referring here in general, not to one user) , look at the whole picture: (for the users) better performance in CPU bound situations and better frame times, (for developers) easier to work and estimate results compared to DX - at least from what we've heard from the devs that are working with it.
+1