JHClues, eh? The user comment "With a flick of the magic wand" by one JHClues from Salem, Oregon is such an obvious plant it's pathetic.
It's not even done up to look like anything other than a press release. How insecure are these cretins that even for a surefire hit like this they have to...well, I can't think of a better word than cheat.
I think whoever reviews User Comments at IMDB should be more careful, unless the IMDB have some sort of deal going. If they have, that's fine, but can we at least be told that User Comments are likely to be planted and partisan if this is the case?
I tell you one thing, though: I work for a film company (they specialise in libraries of older films, not new release), and if I went through their back catalogue of (frankly, ghastly) films putting comments up for them on the IMDB, I wouldn't be as stupid as whoever posted the Potter drivel...