Well, my initial reaction to the list is that it seems to almost exclusively reflect things associated with gay male culture... and probably a lot of club culture. Aside from K.D. Lang... tons of prominent musicians associated with lesbian culture are omitted here. I mean, there's not even a Melissa Etheridge song listed here (no Ani Difanco, etc., etc.).
It's such a pet peeve of mine when lesbian culture is so separated out from gay culture in general.