Can An Elite Point Guard Win You An NBA Title?

With MVP and former #1 overall pick Derrick Rose's ouster from the playoffs Thursday night, and with the Cavs almost assuredly selecting Duke point guard Kyrie Irving with the #1 overall pick in this year's draft, I began mulling over something that I have wondered for a few years now: do elite point guards win NBA titles?

2011 NBA Mock Draft Version Alpha: Just The Tip

 1. Cleveland Cavaliers (from LA Clippers)-Kyrie Irving, PG, Duke

Irving has been the consensus #1 pick since Jared Sullinger returned to Ohio State for his sophomore season, and was probably even the prohibitive favorite to be the top pick before Sullinger's decision.  The Cavs apparently love the kid, and in this draft, there's little reason for them not to.  Let's just hope they have better luck with this Blue Devil than they did with Danny Ferry and Trajan Langdon.  Also, what does it say about the quality of this draft that the overwhelming consensus best player would probably be the fifth best point guard of the last three drafts (behind Derrick Rose, Russell Westbrook, Stephen Curry, John Wall, and (maybe) Ty Lawson)?