Just plain not true. It is VERY RARE to see any wood props made anymore on real aircraft. Just to an airport and see how many wooden props you see on the flight line. For modern aircraft where efficiency is importnat, carbon fiber props are the best choice.

Model airplanes are so overpowered, and efficiency is not required to make the plane fly great, so wood works even though it is inefficient. Many people just measure RPM which does not tell you anything. It is possible to get lots of RPM with very little thrust. I stopped using wood after running tests with switching between wood and the APC prop on the same plane. Speed, acceleration, and rate of climb were improved noticeably when using the Composite prop.