I commute 6 miles 1 way and yes I wear full bikie gear. I want to be comfortable on the bike while riding and I can't even imagine jeans in the summer on a bike! There's a whole bunches of threads about commuting but simply: I leave a pair of jeans and shoes here and just carry a shirts, undies and my lunch. In the winter the pack can get heavy with sweaters et al, but I Love the ride! Plus by wearing full gear, if I decide to take a lunchtime ride of 10-20 miles, I can!

Congrats on your commute, it sure does make a difference in your day don't it!