Don't read too much into it. I've never gone to an interview in anything other than a suit and, trust me, if my employer asked me to fill a management role, I'

Don't read too much into it. I've never gone to an interview in anything other than a suit and, trust me, if my employer asked me to fill a management role, I'd decline the offer (and if told that I didn't have a choice to decline, I'd start looking for a different job). I also never ever wear a suit for work. The reality is that this phenomenon of wearing casual attire for interviews is a significant, and very recent, departure from the prevailing norm for white collar jobs and many people, myself included, have the "always wear a suit to a job interview" social custom as deeply ingrained in our consciousnesses as other customs like table manners. If the tech community were to abandon table manners in favor of "cave man" style dining, would you then hold it against an interview candidate if they opted to use silverware while dining with you? Bottom line, if the candidate is wearing a suit to the interview, assume they are doing it for their own comfort. To behave otherwise is, for that person, taboo.