Imo Tony doesn't have a lot to win by over-hyping this ride at this point.
It's already the most hyped and anticipated ride in the world this year, and people will go ride it with high expectations no matter what Tony says. If the ride hadn't lived up to Tony's own hype, which was no doubt ridiculously high, he could've just said " it's a great coaster!" without adding the " best coaster in the world" remark.
I remember reading Andreas Andersen's ( CEO of Liseberg) blog about Helix and getting the feeling that his first ride on the coaster didn't live up to his own hype. That it was good, but not as crazy as he had imagined. It took him a few rides to accept and enjoy it for what it was, rather than what he had imagined it to be.
So yes, I believe Tony's reaction is genuine.
Anyway,
Most anticipated roller-coaster POV in the world coming later today. For someone in Sweden who's not likely to go to Cedar Point anytime soon, this is exciting!