I drive right on the limit, but I'm also the person who drives right on the roadwork limit as well. I'm seriously the only person, besides an RTA car, who does the roadwork speed on the M2. Driving significantly under annoys me, but 5 or so k's is not so bad. I also make sure to leave a nice gap behind a learner so they don't feel threatened, my car is loud enough as it is, I don't want them to think I'm intimidating them.