Another way to look at the draft, is across years, and see who has come up to the majors each year. Like, one year, pretty much Valencia was it. How's that working out? Last year it was pretty much Revere and some guys that weren't ready. How'd that go? And this year, Revere and Dozier are pretty much it so far (with Hendriks and Parmalee adding negative WAR so far, but likely back up at some point). It's not so much when players were drafted, but if the minors are kicking out guys that help the team win. Also, I'd guess that if you looked at a different year, your results would be different. Should we look at the White Sox draft the year Chris Sale was drafted, and see how many WAR each team has?
I'm not worried about individual classes, but what comes up to the majors year after year, no matter what year they were drafted.