Not that it is a surprise to anyone here in this forum... Two people who attended a John Petrucci Clinic heard it straight from the man's mouth...
http://www.ernieball.com/forums/music-man-guitars/32301-back-chicago-petrucci-clinic.html
Dreamrycher said:JP recently got to play the prototype Mark V. He was very impressed with it.
BigEvil said:When he said that, I knew it was time to start saving up.
Dreamrycher said:Yeah, me too. The delight in his facial expressions when he mentioned it was enough to sell me one.
BigEvil said:Exactly. He seemed very excited about it.
http://www.ernieball.com/forums/music-man-guitars/32301-back-chicago-petrucci-clinic.html