hahaha... funny stuff.
I think there is some truth to the trend of enjoying slower/mellower music as folks get older.. but on the other hand there are plenty of old farts still rockin out to hard techno, hardcore etc.
One thing for sure is there is a wider variety of techno music available these days, and therefore there is more to choose from in the various bpm ranges and styles. I am finding a wealth of stuff in the 125 to 130 range that somehow still captures the techno vibe that I've come to love whereas in 1996 to 1999 I feel like the selection of such music was much more limited. Often times these days people are combining long standing techno ideas and textures with more complex melodies and slower grooves as well, combining the old with the new can yield great results. Another factor may be people just become more aware of the music that is out there as they get older. You listen, you learn, your tastes change, evolve etc (for better or for worse ;-)