Earlier quoted context omitted.
I've been told to reject a candidate because "he didn't seem that excited to work here"
I have rejected candidates for that. When you're hiring for a startup it's absolutely vital to have people who believe in the mission and the product and not just doing the bare minimum for a paycheck. If that's all you want, go work for the government, or Facebook.
Allow me to translate: work indiscriminately long hours in their prime years to make someone else rich from a product or service that will close up shop as soon as the VC money dries up.