Then again, folks that want to sail in area's with lower wind speeds, where it is harder to hit hull speed, will find that a folder/feathering prop will net you upwards of .5-1knot of boat speed in those lower wind ranges, ie less than 10 knots. Obviously if in a 20+ knot wind, the prop is not the worst thing for slowing the boat down!
With that in mind, my boat came with a max prop, and the previous owner did report .5-1 knot gains in lighter winds! In Puget Sound where I am, in the summer we do get quite a few days with winds under 10 knots during the day. So if you want to sail more, faster etc, it really will not matter if you race or not, a folder WILL allow you to motor less!
Another prop option, is a Kiwi. An identical boat to mine north of me that races heavily, he mentioned he gained a bit more speed with a kiwi over having a max prop on the boat. ALong with a bit more motor speed at the top too!
overall, I am happy with the max prop that came with my boat!
She drives me boat,
I drives me dinghy!