Also, Pop must be talking sarcastically here or has a very low bar.
Let's look at Defensive Plus Minus:
http://espn.go.com/nba/statistics/rpm/_/sort/DRPM
Duncan leads the league at 6.13
Leonard at #4 at 4.76
West at #17 at 3.04
Anderson at #39 at 2.27
...
Aldridge #74 at 1.58
oh.... BTW offensive plus minus .... Aldridge rank is #208... swell for a max player, absolutely nice.
So maybe Pop was sarcastically comparing him with his offensive stats. He's a better defensive player than he is an offensive player. But that bar is pretty low!!