well i don't think it matters a toss really
dj's will play what they want essentially and people will dance to what they like.
if you are a dj with any taste or sense you will try to play music that gets people going and balance it with more "experimantal" tastes to see how things go down.
unless you are blessed with a jaw dropping sense of taste /style and a record collection into infinity you will almost certainly have to compromise at some point. unless you are just downright arrogant and pig headed about your music ( plenty of people are like this, i just don't get it but there you go) you will want to play something to get a crowd on it's feet.
which is where i get back to the point about a crossover (yawn)
that's all these dj's are doing! andy farley/ bk / anne savage / fergie (the antichrist) etc etc
they are just playing music ( for whatever reason ) that makes people dance, which basically means thier taste is being dictated by the dancefloor (not the media or fashion police as everyone would love to believe)
at the end of the day these particular djs and more are known for playing hard uncompromising party music and if they play some hydraulix's or compunds or whatever then great 'cos that means the people are asking for it. believe me these guys do not play to a room full of lads scratching their chins and taking notes. they are party djs which to me means techno is in demand for parties which is a good thing and i defy anyone to tell me it isn't ( which you probably will but i'll enjoy reading the response)