I am a doctorate degree nurse practioner, and it is correct to say that your hearing can change from day to day. That could be why what sounds good to you one day, may not sound good the next.
I truly believe that some people are just wired differently from the rest of us. I mean, I'm sure that this fellow has put in countless hours of practice, but so have a lot of people, and none of them (including myself) will ever be able to accomplish this feat! This is really amazing! I'm not i...
Despite everything else, this guy actually has really good timing, which is more than I can say for some of the totally boring drummers I've played with in the past!
Sorry, I meant say about 5 years.