The another problem with the hour is that -- I don't know how about other people -- but I'm the most productive in the early morning, or very late night. My mind is completely focused on work then.

If there's a meeting, or whatever, it means that my output will be seriously hurt. That's another problem with such methodologies' descriptions: it is very tempting to response me that I don't fit to the team or I should try to change my habits, even if, in the right environment, I'm always the most productive team member.