Looking at the trends of AMDs and Intels 90nm products wrt characteristics. It's obvious that binsplits are going up and power is going down at an impressive pace in AMDs offerings since the very beginning of its 90nm node.
I never ever said Intel has poor yields (while I frequently said I believe there is common miscomprehension about world class yields nowadays on this board). In fact, it is clear Intel has significantly lower diecost than AMD. But raising sweetspot of characteristics does a lot of good things for AMDs economies. Yield improvement is one implication of it; but well, Intel being a literally standing target in this respect currently helps a lot in this respect.