I look at it this way: I speed and weave on the highway, and save 5 minutes on my 35 minute commute. That's one way. So 10 minutes per day, five days a week. That's 50 minutes I save per week. 50 weeks per year, so I save 2,500 minutes or almost 42 hours a year. That's basically a weeks worth of work I'm not in traffic.
Worth it.
I should mention that I ride a motorcycle half the year, but don't weave in my cage, because I'm not a complete asshole. I still speed no matter what I'm driving, but not excessively