It's definitely great to see Mayo back riding well again.
It's a mystery what happened to him after looking like the best climber since Pantani and then just fading completely.
I don't buy the popular theory that he stopped using doping, but I think with him it's more of a case of resting on his laurels and not training hard enough for several years. Too much success too fast almost. Too easy.

He is notably slimmer this year I think.

No matter what, it's him and Rasmussen that I'm rooting for so I hope he can keep it up.