Originally posted by Starscream M
yet I seem to recall him being driven away by a weakened thor at one point...
Modern Galactus is vastly more powerful/important than 60s, 70s Galactus.
They're effectively different characters.
Also the only time I recall Thor giving Galactus pause was with the Godblast, which is his most powerful attack. I don't think he was "weakened".