The question is does it matter? If they're only adopting bitcoin to get their money out of the country while the banks are closed, this is meaningless, as they'll convert to a more stable fiat elsewhere.

If, however, they are adopting bitcoin to use in place of fiat, that will be big news. I'll be interested to see if there is a large influx into bitcoin in Greece that persists, but my guess is people are taking the path of least resistance out atm, and also not doing so in substantially consequential numbers.