Top Bunk,
I think you will find it is pretty normal for most aircraft (if not all) to be certified to touch down at Ref minus a bit. After all, Vref is the speed at 50', not at touch down. Most types are certified, and landing figures based on, thrust levers going to idle AT 50' while the aircraft is AT Vref+0 which would result in touching down at less than Vref. Even the turboprops I have flown in the past, which have a huge amount of drag at idle, the AFM still says the technique is to go to idle at 50' at a speed of vref. I think to 'normal' retarding later, and carrying a few knots is more a thing to simply result in a smoother touchdown.
It is normal procedure for the biz jets I am flying at the moment that do not have leading edge devices to normally go to idle at 50'. The lack of leading edge devices (which is the same for the CRJ200 i believe) results in a fair bit less drag, and a much lower nose attitude than an aircraft with leading edge flaps/slats. If idle is selected later, it does want to float quite a lot.