I'm in no doubt that if the eurozone was doing well and so were we, he wouldn't be giving the euro zone a single iota of credit for our recovery. And it doesn't change the fact we had/have a double-dip recession, which is the thing he publicly stated his policies were specifically designed to avoid. So excuse me if I don't place much validity on his analysis of the current situation.
Of course Ed Balls is also bound to say what he said, so I don't find that particularly useful either.
The euro zone crash was being predicted by an awful lot of people at the last election. I remember seeing the 'PIGS' description well before then. If he's surprised by I now, he's not been paying attention.