I'm curious what the percentage of whiffs, or too early to calls were QBs who are often over drafted due to the importance of the position. My guess is pretty high, which probably shifts the analysis slightly.
This stuff isn't hard to look up:
2006: Vince Young, Matt Leinart, Jay Cutler
2007: JaMarcus Russell, Brady Quinn
2008: Matt Ryan, Joe Flacco
2009: Matt Stafford, Mark Sanchez, Josh Freeman
2010: Sam Bradford, Tim Tebow
That's 12 QBs. Four obvious hits (Cutler, Ryan, Flacco, Stafford), and then it depends on where you put Bradford (still starting but oh my god did you see them last night), Freeman (started until a couple days ago, made a Pro Bowl) and Young (started for quite a while). I guess I'd call it 5 hits and say that it doesn't really skew the results to any meaningful extent.