yea i think it certainly does depend on your job and personality. but Im sure there is science behind conditioning without a doubt. If you work 3rd shift, this is irrelevant. If you work from home, this can go either way depending on your habits. If youre a teacher, for example, and must arrive to work at the same time everyday (and in the morning) I would say for sure. I myself, am more productive the earlier I wake up. And I dont go to work until 2 pm. I think its all relative. Great article eitherway. Well written