I prefer just to say British, Dutch, French techno etc. and London, Amsterdam, Leeds, Paris scenes.

However detroit techno is so far from London techno in term of sound that it it useful to have sub-genres. I think we use a city in America because its such a big continent...

The label "London Acid Techno" is very useful because it instantly says Liberator, Ant, Dave the Drummer, Geezer et al. which is, as they say, avin' it!, rather than up its arse like alot of other techno is.

I actually prefer saying "Dirty, Dirty Acid" or "Banging Tribal" - and just not listen to the rest :) ...except maybe a bit of Richie Hawtin who is "Minimal".