According to Pat of Pat's Fantasy Hotlist. He said in Westeros' Literature forum that tGS was the WoT equivalent of Erikson's Toll the Hounds, in that there was good stuff in the book, but 2/3rds of it concentrated on secondary plot lines.

Given that the book focuses on Egwene and Rand, I wonder what he means. Does he consider Graendal, Aviendha, the BA hunters, Elaida and Siuan to be secondary characters whose stories are unimportant for TG?

Also, apprently, Sanderson cannot do Mat very well.

PS: Posted this separately since this is not a review and does not contain any actual spoilers.