Two things I wanted to bring up...
1.) If this is indeed a ruptured achilles, don't be surprised if that was Vince's final game. At 325 lbs (likely more), an achilles could very well end his career. Considering the fact that he's 32 years-old, that may be all she wrote for Vince. With that said, the fact that he walked off the field, and was walking under his own power following the game (albeit in a walking-boot), would lead most to believe that it isn't a full rupture. A partial tear seems more likely, and that can be recovered from.
2.) I'm texting with my old-man, and these his thoughts on the departure of Vince:
"Honestly, though it may sound a bit callous, I'm thinking this is not as great a loss as some are making this out to be. Personally, I'd be much more concerned with the loss of Mayo or Talib or even McCourty than Vince. He's not an every down player at this point in his career (not sure if he ever was), and they need pressure on the QB more than anything (that's been their biggest deficiency, IMO)."
Not sure I agree with EVERYTHING he said, but there's certainly some truth to his words. Between Hightower, Mayo, and Spikes, I think this team has enough beef in the middle to stop the run. If you add a veteran, 2-down run-stopper at DT, I think his (Wilfork's) loss will be minimized. I suppose there's an argument to be made for the fact that he eats blocks and opens up opportunities for others in the pass-rush, but after his departure last night, the pass-rush didn't drop off at all... it may have even improved. Not sure I buy that argument entirely (the block eating argument).
We'll see what happens, but I'm not overly concerned. Vince will still provide leadership for this team, and although he will be missed, I don't see it as a *HUGE* deal.
If I'm wrong, I'll happily eat some crow.