What I have experienced in my present job (with hardware and software engineers) is that there are _many_ who voluntarily or by prescription skip caffeine in favor of hot drinks with no stimulants, but none of them actually is "showing off".

Can't say it's true everywhere, I work in Italy and coffee is a ritual, but I sense that recent trends and issues in nutrition are just making people more self conscious about their health. Some do like talking about it, in my experience I haven't seen that happen within "educated" environments.