Clothes make the ride?

I managed to get off my @$$ and ride into work this morning (well, ride to BART and plan to ride home). Most of the time when I've ridden in I've kitted up since that's what I wear to ride home (12 miles - bike shorts are nice). Today I just put on my work clothes since the morning ride is so short. I noticed something odd though - there's one major intersection between my house and BART, and I normally crosswalk it. Today though I just pulled over and turned with the traffic in the left hand turn lane.

I'm perfectly comfortable taking the lane, and traffic isn't so brutal that the crosswalk is safer, so I don't know why I took the lane today instead. My only thought is that most of the time when I kit up I'm doing back road or bike trail riding, and most of the time when I'm in street clothes I'm running errands and commuting. Either way, I was more vehicular in the my riding in my street clothes.

Anyone else find their riding style changed based on what they wear?