That is true! Just for the record, best economy is usually Round 20-40lop and for a combination of economy and a bit more speed from 10-20lop. Best power is more like 75ROP, and at 8000 feet that is ok, but do not do WOT/2700/75ROP at 1500 feet for very long. It will clean out your heads nicely but if you do it all the time

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Kevin Hortons GPS box is critical. Static Port errors are amazing
I have been test flying Jamie Lee's RV7 lately and it generally does 155 with its cruise Catto 3 blade. I doubt that you will get near the fastest of the 2 bladers but that is the trade off.
Mt opinion for what it is worth, 3 blade props are a waste of money unless you have 310 HP or more to play with. You can argue all you like about this and that, but at the end of the day, facts are what they are. They are slower, and a fixed three blader that is pitched for cruise is not that lively off the deck as you only generate 150 HP out of your 180 HP engine.
I know an RV6 down here with a 160hp & fixed 2 blade, it runs rings around the 3 blade, well almost, but it is quicker and no slower off the deck on a smaller engine
PS: for csu planes, unless you are really needing to pull the throttle, it stays WOT all the time. You would not fly around with a filter full of dirt would you? Think about hat for a bit!