No, I have not run any studies and have come across a few trials of uncertain validity - but I have seen it work empirically with oustanding results even two and half years down the track on a spastic hemiplegic upper limb.
The limb was restored to almost normal function - and the reason behind the 'program' was a severe fracture of the contralteral humerus!!!!! If any one has run proper trials - let me know too!!