Well, I don't fly with crusty old Chief Pilots, but I have noticed a time or two where a new (sometimes not so new) First Officer will try to rotate too rapidly.
I have NO idea where they might get this idea, but I come from the old school, flying old 4-engine types early on, and if these were rotated too fast, especially at heavy weights, getting airborne would have been doubtful, at best.
In addition, a slightly slower rotation rate will enable the flying pilot to successfully handle an engine failure scenario, when and if that engine (especially an outboard one on a four engine type) fails at the most inopportune time during the takeoff...just prior to, or at rotation.
I watched one young guy in the sim rotate with such vigor, that during the wing engine failed just at rotation exercise, he found himself trying to climb at just under V2 at a heavy weight...and getting absolutely nowhere.