Sling Shot Driving to Work?

I had a thought today as I was driving home. I drive a lot faster when I am coming home from work, then when I'm driving to work. I mean a lot faster. I weave in and out of traffic and put the pedal to the metal doing my best Jeff Gordon impression. But on the way to work I stay in the middle "comfort" lane, even if there is an old lady in front of me doing 10mph. I guess this should tell me something? Hmmmmm.... Maybe I am not in the biggest hurry to get to work? I'm definitely not looking to do a sling shot to get there any faster! Oh well, maybe my wife is right... I do drive like a grandpa!