Is it true that Claude Debussy could not play most of his own songs?

by thenewstampede

I heard that Debussy was not really the greatest pianists and in fact he could not play most of his own piano pieces. Is this true?

erus

I understand he was AT LEAST a competent pianist, and that he in fact played many of his own works.

This website presents part of a thesis on Debussy as a pianist (the original thesis being in Norwegian).