Dylan noted in his nonconference review that Michigan had gotten somewhat "unlucky" in its three-point defense. In other words, Michigan prevented teams from taking a lot of 3s -- something kenpom notes teams can control -- but the teams hit a large percentage of them -- something kenpom believes is largely out of a teams control.
That trend has continued through 2 B1G games. Iowa hit 58% of its 19 3s against UM, well above its 38% average. PSU, a team hitting 35% of its 19 3s, hit 42% against UM, and Josh Reaves, who had hit 8 of his first 59 3s in college, went 2 for 3. Neither team took a ton but made a lot.
Now, I do think Michigan's defense has something to do with this -- poor closeouts, letting opposing players feel comfortable shooting, etc. But there is some hope that Michigan's 3 point defensive luck will improve in the future.