I mean every word so far has been an imperfect descriptor, I wouldn't throw out "popularity" just because it's an imperfect match. "alignment" is probably closer to correct, but it's not very clear to a new user imho.

An imperfect understanding of the word "popular" will still lead someone to basically correctly understand the WoT score. "apparent popularity" actually is a near perfect match imho, but it's a bit wordy.

"in groupiness" was my first thought after popularity, but I think it's also a bit unclear to your average new user, and it sounds goofy lol