Qui-Gon wasn't surprised that Obi-Wan's first thought was to blame himself, however indirectly. His grip tightened the moment he asked if it was his fault somehow, wanting his former Padawan to know without a doubt that he wasn't to blame. Far from it.

Anakin, on the other hand...

"Partially," Qui-Gon admitted, "I haven't made any headway with Anakin, and it seems that my presence upsets him more than it puts him at ease."