Wikipedia says it's "alleged," but does cite a couple English-language articles from 1923. On the other hand, one would imagine that exponential notation would solve any problems associated with "too many zeros."
Yeah, the only online contemporary articles I can find are wry in tone - one talks about how all those goose eggs (the zeros) will soon be making way for the goose step. Could be more ironic commentary than actual reportage. I can't find anything in German. Will keep looking.