Intel has 'the best' chips because they literally pay the price for being, at least on their headline grabbing products, a full process generation ahead of more or less the entire rest of the semiconductor industry.
I think they've acknowledged that they're slowing down with their new strategy [1].
[1] http://arstechnica.com/information-technology/2016/03/intel-...
They've already decided they're going to fab ARM chips, so I think they've already come to this conclusion.
The plot 2/3 down the page compares Intel's process with competitors. It's a bit out of date in the sense that it only shows projections instead of the result after-the-fact, but the plot shows that Intel is still ahead.