Very likely the case.
I mean, I work full-time+ (in other words I regularly work over my contracted hours, usually unpaid) and have family commitments - this means the only time I really get to be online/play the game is from around 22:00 until whenever fatigue takes ahold (but I never stay online after 1am).
Not trying to be some apologist here but, judging by recent pictures, YoshiP looks pretty exhausted and its fair to assume that he puts in the hours and then some!
