Certainly, some of the foreigners weren't quite as shy about asking questions.
Of course, whether or not they had the background to decipher the answers is another question. Robert Nadeau, for example, didn't even speak enough Japanese to ask those questions directly - I'm not criticizing him, but you have to place things in the proper context.
Well, I was once in a similar situation to Robert Nadeau and asked Saito Morihiro Sensei about O Sensei. He told me to wait until I had learned more Japanese.
Rather later, I asked the present Doshu (in Japanese) whether he ever asked questions of Morihei Ueshiba. If I translate his answer, it was something like, 'Heavens, No. He was O Sensei. You had to wait until he gave you the information / explanation he thought you needed.'
Doshu, who would have been 18 years old when Morihei Ueshiba passed away, was behaving like a typical Japanese of his age. In Hiroshima University, the only students who ask questions from the professor are those who have been abroad to study and so have been 'contaminated' with 'foreign ways'.