Well compare the first 8 games
Boozer's first month with the Jazz
8 games
34 minutes per game
22.1 ppg
10.3 rpg
59% FG
.25 steals per game
.25 blocks
2.3 assists per
Boozer shooting 59% would be a good indicator of grasping the system faster. Al only shooting 45% which is only 5% lower than his career average. Which seems low for a big man. So this might be what is to be expected from him, only slightly better.
Boozer really got off to great start with the Jazz he had 27/11 first night against the Lakers and then had a 30/17 his third game against Denver.
Al hasn't been as terrible as people say but he hasn't had the start Boozer had.