I ve seen more of him chasing wrs from behind than him being in a position of power. I'm sure if you pull up times targeted by starting rookie cbs, he would be leading for most yards allowed.
A lot of the time that he's "following" is scheme related. He's looked pretty good in press coverage in crossing routes and anything under 15 yards. On go routes, or any deep route really, with our two deep nickle sets, he releases the top of the route to the safety and falls to underneath coverage - that's a scheme set up and not a coverage failure. Unfortunately Nakamura sucks balls.
As to your targeted yards point; he would likely be near the top. There's a few reasons for that. Very little rookie corners have started every game as a number two this year, and we've played three very prolific passing teams out of our four games.
Norman looks to be progressing fine in my eyes.