Greece definitely doesn't have much activity. I'm not sure where this hype that it was somehow Greece which sparked the previous spike in price came from. But definitely not from actual volume increase.
Yes. It seems like the Greek volumes are down. But I am still doubtful about it. Suppose, some individual in Greece purchases Bitcoins from some buyer in Russia, using Western Union as a payment option. In this case, the trade volume will show up in Russia, and not with Greece. Also it should be remembered that a lot of Greek banks are having their branches in Russia and vice-versa.