Yeah, I overstated it, it's really from 2007-2013 as TFP points out. I certainly wouldn't judge the result of his entire tenure by it since the book is still out. Only that had he done a better job in that area during those years, he'd probably still be here to see the fruits of his later drafts.
What would be interesting, but time consuming, would be to look at the overall value provided via his drafts vs. the average value a generic team could expect to get. Did drafting a handful of very high end talent in a couple years ultimately outweigh all the busts? Or would it have been better to hit consistently, but at a lower ceiling?