I'm not convinced, I can be focused to the point I forget to eat if I'm engrained on something. If I have a goal I work tierlessly towards it.
What I don't do is plan in a time linear way.
Hell I don't know who the guy is, he just didn't seem J typed at all - too much movment in his body - innability to sit still. playing the audience effortlessly aside from his chat to the interviewer... Even the lyrics to the songs - too many words in his earlier lyrics, thats not J liked.
Anyway it's really not important... You guys clearly know him better than I ever will/ever want too