[jtzako]

I've noticed this in pretty much every car I've ever driven. It seems very common for people to 'follow' other drivers.

I've seen the opposite too. I was behind someone who was going over the limit and had reasonably quick acceleration at several stop lights, then suddenly we end up at a light and the car next to him accelerates very slow and never gets up to the limit and this guy now is going very slow right along side them.

I call these drivers 'sheep', since they obviously need someone to lead them.