Percentage of shots on target by team

[JG]

I was looking through the stats for the Pando award and thought this was kind of interesting:

DC United 58.3
Chivas USA 49.7
New York 47.7
Kansas City 47.6
New England 43.2
FC Dallas 42.6
Chicago 41.9
Houston 41.3
Columbus 40.0
Los Angeles 39.8
Salt Lake 38.7
Colorado 36.6

Impressive stuff from DCU...last year's leader was the Revolution at exactly 50%. Losing Dema (13 for 41 last year) helped a bit, but any idea why DCU is shooting so accurately? It looks like an across-the-board improvement, with only Erpen shooting noticeably worse. Is it just luck?

[numerista]

2006 MLS Goals per Game
High: Dallas 1.92
Low: LA 0.67
Gap: 190%

2006 MLS Shot Attempts per Game
High: KC 12.77
Low: NY 10.83
Gap: 18%

Every MLS team is taking roughly the same number of shots, but they clearly aren't all the same quality. It's almost as if teams have a fixed appetite for shooting. That is to say, if lots of high-quality chances are available, teams become fussy eaters; if not, they hit the buffet.