thing is, its not just in the Techno scene this is happening.
In the past couple of years, in addition to many half empty Techno clubs, I've seen DJ Premier play to about 200 ppl, Flavor Flav entertain a crowd of about 50, and most shocking of all, Clipse in Leeds with a couple hundred there.. less than 200..one of the best live sets I've ever mind.

Radio One, MTV, Channel 4 etc have been pushing Rock music hard the past couple years, and alot of kids wanna go see bands instead these days..