It's hard to use TT results leading up to worlds to determine the exact form of the contenders in relation to where they stand to each other. The main time trials we have had (Pologne and the Vuelta TT) both had courses slightly different to the worlds course. Both being shorter and the Vuelta one having a climb in the middle.
In the case of Wiggins in Pologne, Cancellara and Phinney likely were still building form (Cance probably being the one further from top form since he was going to the Vuelta). And we don't know exactly how much training Cancellara has been doing on the TT bike.
Cancellara has been looking strong on the climbs as he prepares for the worlds road race, which I think will still be his main goal over the TT. Meaning the climb in the Vuelta TT would have suited him and gave him a slight edge over Martin in winning the TT there. And if Cancellara's training has been focused on the climbs rather then on a good flat-land TT performance, then we can assume Martins form is very good coming only 37 seconds back of a Cancellara that is climbing so well.
What we can judge from their TT results, is the big favorites all look like they will be on form. Cancellara and Wiggins with their TT wins, and martin with a strong solo break ride and a good performance in a TT with a climb.