I totally see what you mean. I'm too young to really remember the 08/09 ski season as far as the park scene goes, but I definitely understand what you mean. The number of people wearing "park" clothing has doubled since last year. The park scene at my mountain is pretty small, so there were only about 20 or so kids who actually knew what they were doing in the park, and everyone knew everyone pretty well. This year, you see swarms of 11/12 year olds riding around on their 145 afterbangs and their medium saga hoodies.
I certainly "overdress" my park ablility, but I think that you can still see the difference between who is good, and who is bad in the park. Even though the number of kids wear park gear has gone up a lot, I can still see who is who in their ability levels. That may just because there aren't as many kids as my mountian as you would get a pc or breck. Just my thoughts