I mainly agree, but I think there's a big difference between focus, which is good, and "talks about how little sleep he is getting like it is a badge of honor". A lot of great people I know are very dedicated, but I think that's very different than
performing dedication.
Last night, for example, I had dinner with a super bright scientist friend. Within minutes we were into a detailed discussion of the science of using ultrasound to examine breast tissue. (It was great to watch people crane their necks to find out why somebody was talking animatedly about the racial differences in the tissue composition of women's breasts and what implications that has for frequency choices.) It's clear that when he's on a project, he just thinks about this stuff all the time. But never once did he mention how hard he worked, because he he's far too interested in the work to give a shit what people think about how hard he's working.
One of the thing that really troubles me about the current startup zeitgeist is the extent to which people are here because they want to do a startup, rather than their passion for their particular domain. If I were the OP, I'd really be worried that I had a CEO who was here because it was fashionable, one that focused on the performance of working than who was truly dedicated to making things happen.