I believe that this myth is actually true in part. I'm a night owl myself but you get more time in your local zone if you get up earlier in the day. So this can hypothetically mean more productive time
RE: Library D&D: the Lair of Onvyr the Necromancer
It really was. I was so far behind afterward I wasn't sure if I'd even be able to keep up with the rest of the team. I'm glad I can look back and laugh on it as I recount my bloody awful luck that day.