No I didn't; my evidence is just based on viewing experience here. Similarly, you didn't provide any evidence that your claim was true.
And you said it first.
Burks and Hayward don't play the "Jimmer" role anymore (being first choice on O, kicking back on D), but I simply don't subscribe to the philosophy that players should be allowed to take it easy on defense in order to have energy on offense--especially not to the extent that the likes of Boozer did. And the notion that the likes of Sloan would let players get away with such subpar effort continues to amaze me to this day. The latest "evidence" that such a strategy doesn't work is the 2010-2011 Jazz season.
So what? What happens in Minneapolis stays in Minneapolis. And I don't know what to make of your double negative. Even I will acknowledge that AJ's D isn't nonexistent.
He's here now, and it takes about 5 minutes to tell a player to play D and for him to show whether he's putting forth the effort. It takes longer to learn to play effective D, but he's been here a year, and neither the effort nor the defensive skill advancement are convincing. Positive, but not convincing.
No I don't, because I question how much time is being spent with him in practice on it. As the season record showed, any strategy--conscious or unconscious--to merely improve his offense was not sufficient. Certainly other players were part of the problem (and potential solution), but the center especially needs to be the one who sets the defensive tone. AJ didn't, and there were backup options that did--for a few minutes at a time, which was all that would have been reasonably expected for them to play, in order to shore up the middle and to show Jefferson that his minutes weren't guaranteed if he was going to dog it. Not clear where Corbin sits on such a philosophy, but it wouldn't be hard to implement a more aggressive approach than Sloan paradoxically did in his last years.