[MBCpro]

As with many things outside the machine, I don't think they know what they are talking about when they say release the putter. Some will say one thing another will say something else. That little terminology problem that Mr. Kelley tried to help solve!
Some may be seeing the hinge action but not knowing what it is, they use this term, some may just be seeing and teaching the arc, I really do not know but as Ben Doyle would say " you release accumulators, not the club". Ben would say "you release the putter when you hand it back to the caddie"
Just my thoughts,

Todd