On pure flat long TT's Martin is the man to beat. In prologues Cancellara is probably still the best. And in hilly TT's it's a tie between Froome and Cancellara.
Wiggins is somewhere in top 3 in all of these 3 kinds of TT's. Martin isn't in top 3 when it comes to prologues IMO.
Since most TT's are flat and and some are +30k, TMartin must be the best TT'er of the year, also considering how many TT's he won this year (100% of his wins were ITT's or TTT's eventually leading to 2 stage race overall victories).