You can read pumping Iron for yourself and Charles Gaine's description of when Nubret posed, he seemingly 'lost' something from his physique, and the audience at the Brooklyn AScademy of Music sensed this.
He described it as though air were emiiting from his muscles, that his poses failed more and more to impress. FDBi, FLS in particular were not as impressive as those of his competition. Legs were not much from behind.
Nubret was one of the greats...just not THAT great.
So, not 'bullshit'.