My own new comments weren't showing up as highlighted for some reason. Now they are.

I didn't believe I had an average score of less than 3.5 (not to brag or anything... it's only 4.4, for the record ;), so I went back to average my last 50 comments scores, and on the 2nd or 3rd page I noticed my username was finally orange.

Anyway, it seems to be ok now.