That sometimes happens.. Perhaps more so during summer. August is the holiday month in Europe.
I think that the more simpler the extension the faster it gets out from premoderation.
But if there's something really "funky" in a submitted ext then it might stay in the cue quite long.
Simple rules:
i) Don't try to hack Opera - follow Opera (and Chrome) api/dev sites.
ii) Don'y try to exploit the user with a dubious extension.
🙂
(not saying this would be the case with your ext)