It is true that members of subcultures, such as goth girls, will have a far higher variance in perceived attractiveness. However, this is a fairly small percentage of the population. Furthermore, aspects such as facial symmetry are universally perceived as attractive, so even if you don't like goth girls you can probably judge if one is more attractive than another.
The recent OKCupid blog, which gwern mentioned in Media Open Thread, investigated the impact of three different factors on users' perceptions of each other: authority (reported match %), profile text (present or absent), and looks.
On the bright side, the authority versus reality match-up came out tied:
If you don't consider that a good outcome, you're not yet sufficiently cynical.
If a picture is worth a thousand words, what are a thousand words worth?
... Approximately nothing.
And the winner is...