Sorry Nomar I don't think we're on the same page and I'm not really following your challenge to the blog. Kenpom is suggesting that there is no correlation between early season 3p% allowed and late season 3p% allowed which is to suggest that the statistic is not influenced by the opposition. If it was, you would expect that teams who do well against the 3 would continue to do well against the 3 and vice versa.
Pomeroy is saying you shouldn't credit or discredit Stanford with the 3p% of their opponents previously. Isn't that directly on topic?
I didn't say, "Stanford's bad at defending 3's because their D3% is ___." I said it was bad. They were giving up over 7 3's a game and, yeah, at a high percentage (particularly compared to their overall DFG%). It's not like they'd allowed 4 shots from behind the arc all season and allowed 2 makes and I was saying, "Man they're bad!"
I also happen to think he's dead wrong in suggesting that D3% is something a team has no control over. Do you actually believe that? Is it an accident that UConn has historically had low a D3% over the years? I don't think so. We happened to have great shotblockers so we could close out on 3-point shooters. Considering that Stanford allows 40% overall, it's pretty clear that closing out is not a major goal of theirs. Frankly, I'm shocked he even wrote that, it's so ridiculous. Of course a good defense can neutralize 3-point shooters better. Numbers can't tell the whole story of course.
I mean, I love metrics as much as the next guy, but you know what Mark Twain said about statistics. (A reference which, I realize, undermines my argument as well as Pomeroy's.)