Funny thing is i met Danny at a workshop with Billy Hall and someone had the pioneer there that day and Danny was throwing all of our equipment. He was hooking the entire lane with our stuff and left handed, i would say he is a legit 210 bowler as a lefty.
Probably in the area of 350 rpm's as a lefty and around low 400's as a righty, the guy's armswing and balance is incredible. Very easy going guy and i have heard mixed things from upper level bowlers on him but my take is just a regular guy that loves the game. He did this for free no questions asked i could not even get the guy to accept a beer from me for his help.