I'm sure it's through third party sources. But the fact his drive was less in 2007 and 2008 makes no sense given the fact he was in the final pairing of the last round in the '07 Masters, '07 USOpen, '07 PGA and '08 US Open and won the '07 PGA, '08 US Open and finished runner up to Immelman at the '08 Masters. Had to be working pretty hard then, especially to win on one leg at Torrey Pines.
Like I said, I think there may some merit to Tiger's lack of drive from 2010-2012 when he was going through a ton of personal life problems, a lot of injury issues and what not, but I think Tiger hit the re-fresh button to start 2013. Lot of people have said he worked extremely hard last year and it paid off...it was like a new Tiger...maybe not so much in the Majors, but he put himself in position to win 3 of them.
If there's one mistake I think Tiger made it was getting rid of Stevie. I don't know what the breakup reason was...if it was personal or what....but Williams and Tiger were a great match, particularly in the Majors, and as good as LaCava is, I don't think he has the same effect as Stevie did on Tiger. Look how Williams has helped Adam Scott.
Well, from what I have heard about Hank and see on his TV shows, he demands a lot of work from his students. He doesn't like to work with people who don't work up to his expectations.
It may be that Hank has an unrealistic ideal of dedication to practice. Tiger may have been putting in loads of work in 2006-08, it just wasn't the same as previously, and to HH, that meant Tiger was sloughing off....