I didn't read it as putting him down at all. This wasn't a competition between the patient and the surgeon about whose medical skills where the best, but about the surgeons skills against the reality of the cyst.
I didn't think (s)he was calling me brilliant but unpolished. ;-)
I took it as more of a general observation, which I agree with but I don't think it makes for some of kind of rebuttal to my conclusion, which basically amounts to: If you really are extremely good at something, asserting that you are that good is likely to sound arrogant to other people even if it is simply factual. I try to keep stuff like that in mind and not jump to conclusions about the size of a person's ego based on limited data. Other people seem to generally be very willing to jump to such conclusions on very limited data. I offer the anecdote to suggest that, if programmers are generally competent and intelligent, it won't much matter how humbly they present themselves. Their competence will rub plenty of people the wrong way, no matter how many sets of velvet gloves they have for all social occasions.