Meh.. he still can't understand efficiency pace-adjusted stats.
The only valid points he makes are boring clichés: good offense fuels good defense... well, sure, you don't allow so many fast-breaks... slow paced teams don't allow the opponent to score many points as fast paced ones...well, sure... and of course slowing down the tempo can improve marginally the defensive efficiency, as it's easier for the players to keep the stamina - fatigue sets in earlier in teams that speed up the tempo -, and a slow tempo is more adapted to teams that defend better in half-court sets, as the C's. But Celtics' transition defense was pretty good for most of the season; I'm not looking for stats but I'm sure that our allowed %FG in the first 10 seconds is among the bests in the league.
Now, I can find an acceptable explanation for this debacle: I think he may have heard someone saying that "bad defensive teams shall play in a slow pace". Which is generally true: when your guys don't have a clue on how to get a stop, every coach slows down the tempo to protect their defense (well, every Coach not named Jim O'Brien or George Karl). There's a chance that he messed up and buried himself in a classic and rather annoying fallacy, coming to the conclusion that slow tempo teams play bad defense.