Well my experience was this. I have a 16.5 foot Lowe Sea Nymph with a 60 hp 4 stroke yamaha. Had a 3 blade 15 pitch prop and boat would go 29 mph top end at 6200 RPM which was slightly over max. Yeah a real screemer!
Problem was me and my boys then were somewhat on the big size...we is fat! Would take forever to get on plane. So I talked with the Power Tech folks and Marcus and we came up with a plan. Now a 3 blade prop had 20 hp per blade. A four blade prop has 15 hp per blade. Marcus said it wasn't rocket science just geometry!
So we settled on a 4 blade 11 pitch prop and RPM dropped to 5700 RPM, max is 6000 RPM so I was happy. Speed increase to 31 mph and the holeshot is fantastic. Also something to consider if you ever fish in rough water is the hold power of that prop. The 3 blade would bleed off energy and I was constantly having to change throttle to "hold" the boat on plane like we wanted. That 4 blade prop has more thrust and easily hold the boat where it needs to be.
Now My engine is small by most any standards folks use, but the "geometry" would apply to larger engines too.