Valv.Piti said:
			
		
	
	
		
		
			I actually think Nibali, Contador, Quintana and Froome at this time are relatively equal.. Froome has declined from his 2012-2013 years, rather drastically this year, due to him rightfully not really focusing on that area. Contador is probably the more gifted TT'er, but I think he is relatively equal to Nibz, while Quintana is a tad worse, but I dont really think that much. On a flat 50 km ITT I would be a little surprised to see more than 2 minutes between those 4 riders in top condition, with Contador and Nibali not losing more than 1 minute to Froome, but should the Tour organizers throw a curveball and get back to 100 ITT kilometers, Froome definetely has the higher ceiling at this point if he really puts in the work.
		
		
	 
I think it's doubtful that Froome has really declined with no way back, or if, as you say, it's just that he hasn't worked on it much recently.  Since his transformation in 2011, there have been five long time trials in the GT that has been his main focus of the season.  In those five he has finished either 1st or 2nd every time (being beaten only by Martin or Wiggins) and has put a lot of time into all the GC contenders in every one.
So, when there has been a significant TT in the main GT he has targetted, he's basically been up there with the very best time triallists in the world, whether it has been flat or hilly.  I can't believe that he will have lost that ability, considering he showed it for a fairly sustained period - not just a one off performance.  
Contador is a level below that imo, and has been since 2009, but he has the better recovery in GT's, so by the third week there is probably very little between them.