There's to many unanswered questions for me atm, i was expecting the 1080 to be faster than the 980ti but not needing 1800 core to do so.
I don't think that's the case. Usually, yes - 1200 stock speed is very typical, however nvidia is already loosing the battle in DirectX12 games against AMD. In fact, more of them will come out in the future. i think in 10-12 months time, DirectX 11 will be used only by smaller game developers and indie. We all know that nvidia has started working on asynchronous shading too late and it won't be fully functional in these two pascal cards. Therefore imagine how it would affect their sales, if 1080 and 1070, would perform just as bad as all Maxwell cards did? It would literary destroy them and their strong position of the market-share. So I think they've put the clock speed this high on purpose, just so that their new cards would perform about the same or better than AMDs in the same price range. Knowing that on DirectX12 nvidia has performed about 20%+ worse than any AMD card in the same price range, it shouldn't be a surprise to see these numbers, as the clock speed must be higher to get the same performance in game.
It probably won't be so high with the Ti and Titan cards in 2017, as HBM 2 and a proper async shading support will should fix that problem.