Swat's Up? Inside the blocked shot

Just how important is the blocked shot? And who are the best practitioners of the art? Here's what stats wiz Roland Beech of 82games.com knows:

Blocks Leading to Wins

From 2005-06 through this season, teams that blocked the highest percentage of shots sported significantly higher winning percentages than more block-challenged squads.

Why is shotblocking tied to winning?