The root of this comment tree was written by someone who wasn't familiar with Wolfram's reputation but saw cause to gripe anyway. The transition from "Stephen Wolfram" to "absurdly self-centered" occurred by observation, not hashtable.
I hadn't heard of "Pavlov's hashtable" before, it's a neat concept, and I'm glad you brought it up. I just don't think it's responsible for the direction of this particular comment train. Which is in itself a testament to the peculiar qualities of Wolfram's personality.