Meh re Wiggins lets just wait and see what the Tour brings. There is inevitably some doubt before anyone wins their first GT on the road.
Wiggins has yet to prove he can win a GT, yet I am unconvinced by the proclomations that he will necessarily falter in the thrid week-
He has contested four GT for GC-
Tour 2009 - He rode pretty consistently in the mountains, struggled slightly on the final two mountain stages and was sixth in the final TT 40s behind.
Tour 2010 - He didn't have the legs in the first week let alone the third.
Tour 2011 - He crashed, who knows what his form would have been like?
Vuelta 2012 - Podiumed. Almost all of the GC stages were in the second week. The one climb in the final week he struggled, but it was the type of climb you'd expect him to struggle on i.e. a short very steep climb. Additionally, although the Vuelta field was weaker, Wiggins cannot have been said to have been in maximum form as he had only recently recovered from his collarbone break.
Evans was the strongest last year and rode a tactically astute race. He has however cracked in several past tours (admittedly he was facing Contador in some of those). He is therefore not averse to having a bad day.
I have already bet on Menchov for the Tour @ 50/1 they really were ridiculous odds.
I think the Top 4 places will be distributed between Evans, Menchov, Schleck, Wiggins. Which order I suspect will depend on the manner the race is ridden. An agressive race favours Schleck and Evans and will intorduce the likes of Nibali, Gesink/Mollema, VDB2 and Rolland whereas a tempo race will favour Wiggins and Menchov and introduce the likes of Klöden and Leipheimer into the frame.