I think if you are talking about most storms ..that Stowe Under measures in a sense . I think PF has said they measure conservatively and like skiers pleasantly surprised , that probably account for maybe 15” thou .
I always believe Jay S.S’s and Bolton maybe just decided it was not a bad marketing idea since Jay gets away with it . I know these are “fighting words” for some , but that is my opinion w Jay and I’m trying to make an educated guess on Bolton this year (unless they clear every 6 hours now ) which would usually yield vastly increased totals in N greens @ elevation . So as far as J spin meticulous measuring goes ..don’t folks realize a cleared board of fluff in N greens is gonna yield about a 15% increase in totals than waiting for snow to end and starring at a Mansfield snow stake ?
**You can very easily measure with 2 different approved techniques for the same area and get a 15” total and a 19” total simultaneously **
if I was a ski resort I would probably measure using the 6 hour clearing method .. but have a “sticky highlight “ admitting how I measure so the smart folks get it