AbbÃ© Wallez wanted HergÃ© to put Totor in Le Petit VingtiÃ©me, but HergÃ© demurred, and revised the character as Tintin.
I should have added that Goddin says, according to the testimony of Germaine Kieckens, Wallez suggested the character of a globe-trotting journalist.
we have nothing to say they even knew of him, let alone heard of him
Goddin says he was so famous it would have been impossible for them not to have heard of him. Even if he wasn't an influence, it seems a bit much to suggest they hadn't.
were Huld to be truly the inspiration - wouldn't it just have been more likely, more essential to their "influence", that they would have left the character as Totor the boy-scout?
Not if they wanted a "special correspondent", reporting on his travels.
And it does seem to me far more likely, if anything, that word of Tintin made it's way to Denmark, and Huld heard that the character was based on a scout (Totor) who had gone on a wild adventure, and mistakenly believed it was him.
While it's equally possible, there's no more evidence for that either. The Palle Huld story is an interesting idea, but we'll probably never know for sure.