In a pack is the least of the times I want to drive fast. I generally drive fast during the times that the cops don't mind. If I am driving late at night or on a road with little to no traffic, I drive a bit faster. On a busier highway, I stick to 5-7 over the limit, and the police are fine with that.
I drive an 06 Si, am 35 years old, and have never had a speeding ticket. Not that it won't happen eventually, but I try hard to drive with some common sense, and it seems to work...