He basically said those things in an interview once. So while he might not react that way when looking for a job it really just depends on how much he wanted the job.
it really just depends on how much he wanted the job
I disagree. Feynman was famous for speaking his mind regardless of the context (Bohr insisted on Feynman's presence at critical points during the Manhattan project for exactly this reason, in fact -- everybody else was too inhibited around Bohr to speak up).
Feynman might have kicked himself afterwards, but wanting a job wouldn't have prevented him from pointing out an interviewer's errors.
There is a huge gap between speaking truth to power and being snippy to make yourself feel better. As a ridiculously intelligent and anti authoritarian friend put it. "You don't walk around barefoot on the first day of a new job, you need to break people in."
PS: And yes, he would eventually walk around the office / data centers without footwear.
