And to answer your question: not right now. I think Greece i also watching the ECB; we'll probably see Greece's government trying to delay it the exit.
Pro-Grexit economists say that withdrawing=inevitable, and that delaying only hurts the EU lenders more, but I just can't see that happening right now given the political implications.Greece leaving the Euro would be a clusterfuck of epic proportions for the Greek government; Greece's economy would tank like hell, dropping its already lowered living standards even more. Then we'll get even more riots and instability for the time being. I guess if they're desperate enough, they'll do it, but until then, I doubt it.
We still need more information right now before any clear guess for Greece's exit can be made. I mean, we've had extremists say Greece will leave in 2012, 2013, and 2014. Well, as far as i'm concerned, we've nothing concrete to make a proper say.