Exactly. Apples and Oranges.
He may have, but he hasn't. Since leaving DT, he finished out the AX7 tour, did some drum clinics, he's recorded like 4 albums, and has a tour lined up with one of his many new bands.
From following his FB, he's barely been home since leaving DT. He's been far busier and spent more time away from home than the band has.
I think the above article is slightly being taken out of context. When I saw him January, he never looked happier. Every video interview I've seen from him in the last few months, he's seemed much happier than he has in a while. Where as before he quit, he was seeming pretty darn miserable both in interviews and in person.