I am not saying this, at all. It is all AMD marketing team fault. Complete silence on the matter of P10 GPUs makes creates space for... things like this. I know that AMD wants their hardware to defend itself, but...
What concept people have about R9 390X? Being slower than GTX 980 Ti. Where reference GPU is on the same level of performance, both graphical, and per watt. It is only however in a situation where both GPUs are not bottlenecked by software. Look at Killer Instinct benchmarks, that have been published lately. R9 290X is 5-10% slower than GTX 980 Ti. Why? It has 96 ROPs and higher core clocks, compared to 64 ROPs. But core count and compute power is very similar for both GPUs: 6.1 TFLOPs, vs 5.6 TFLOPs. Makes sense?
The same goes for R9 380X and GTX 980: GTX is faster due to 64 ROPS, and 4.6 TFLOPs of compute power, and R9 380X - 4.2 TFLOPs, and 32 ROPs. And it is within 10% of GTX 980. What is more, both GPUs have similar power draw.
However absolutely NOBODY will consider Polaris 10 interesting because it will be on the level of R9 390X. Even if in practice - it might be on par, or faster than GTX 980 Ti.
All of this is AMD's fault. They are not able to be loud and change peoples mindshare in fair way. And what they do? They are COMPLETELY silent. And that creates room for speculation, like above.
I do apologize in advance to mods, and everyone who will feel uncomfortable with these words, but their marketing team sucks D***.