It's true that the depth in the women's field in the early 2000s exceeded that of now, but then again that period was one of the most competitive in a long time. That, however, doesn't mean that the women's field has less depth than the men's now at any means. I acknowledge that there has been more consistency in the big-title winners this year than the many previous (with the rise of Serena, Vika, and Maria again) which definitely lessens the depth in the women's game. However, the same hegemony these three women have cast in 2012 cannot match the dominance exerted by Federer, Nadal, and Djokovic in the last decade. I do understand your point though that 2012 was remarkable in that the grand slam winners for the women were more consistent than the men's, but when looking from a more macroscopic point of view, there is more depth in the women's game.