(oops, thought this was the S18 thread. -1 ball for carelessness)
thanks for the replies everyone.
when i trained GS in past seasons, i remember multiple players in the 65-75 min range actually *dropping* in GS!!  yes, you read that right.  many times 2 or 3 players per GS training dropped!  (not always the same guys btw).  that's why i was initially *stunned* that not just 1, but all 3 of his players w/ 110 min have strong GS.   never paid attention to what happens for just a one-off 3 game week though, so thought i'd ask.   
will have to go back & find my data from training GS sometime.  not exaggerating --  a few times the results had even been almost worse than expected had i *not* trained GS.  well outside of a few scrubs in the 30-40 min range i didn't care about. (got boosted to proficient)  and someone around 90 minutes that only dropped 1 level instead of the possible 2 levels otherwise.