Armstrong isn't agreeing with you AndyP – what he said, quite rightly is that some riders (eg Evans) are far enough back now that it's going to be very difficult for them to make it up. Not impossible but unlikely. What he didn't say was that all other riders (bar Contador) were in that position.
Some things to consider ref Contador not getting support from his Astana team
– The Astana paymasters (eg the Kazaks) have said that they want Armstrong and Bruyneel out of the team next year. If that's so, some of the riders wouldn't be well advised to support LA rather than Contador..
– If Astana fail to support Contador, I reckon that Caisse D'Epargne, amongst other teams will do – CD'E because they're regarded as the team who Contador's going to next year, others because LA/Astana/Bruyneel isn't that popular
– The tactic on Monday to take time was text book and absolutely the right thing to do. Contador lost no time to anyone who mattered other than his team mate and it'd have been silly for Astana not to have taken advantage of it when there's always a risk that Contador may have problems (crash, etc). They'd have looked pretty silly losing the tour by a few seconds at the end when the time was on offer.