We cannot even judge or review on APU 13 in fact we need to see actual of non marketing reviews like Guru3d or Anandtech when patch comes out.It's interesting to see the polarity amongst the camps here..
How can you be so sure Mantle will be an awesome success as claimed? You cannot. We don't even have BF4 performance results yet. It's all hype.
Likewise, how can you be so sure Mantle will fail hard, to justify the endless trolling going on here? You cannot, you have NOTHING to substantiate that it wont perform well.
So really, take a chill pill and wait and see. It's interesting times ahead.