Agreed, the probe requests and probe responses do not hog the medium. As noted most of us do not enable RTS/CTS, it would be clear if the researches pointed out

Agreed, the probe requests and probe responses do not hog the medium. As noted most of us do not enable RTS/CTS, it would be clear if the researches pointed out the exact conditions under which they performed their tests. With out which the statement has no weight.