Personally I think it's funny it took Nikon 4 cameras to compete with the 5d3.
If it would be Canon, people would call it clever because Nikon managed to sell 4 models to their customers before they now all want to upgrade to the d750 :-p
Errr, I'm not sure I follow your logic there bud! Nikon's sales figures for their attempt to take on the 5DII and 5DIII were very poor. 4 models of which none of them sold well. Canon knocked the ball out of the park with the sales for both the 5DII and 5DIII models. It's a pity they didn't quite get it right with the 6D. A great camera for sure, but not quite what the market wanted or needed.