Greek depositors withdrew €700 million ($898 million) from local banks Monday, the country's president said, as he warned that the situation facing Greece's lenders was very difficult. [...]

In the past two years, deposit outflows have generally averaged between €2 billion and €3 billion per month, though in January they topped the €5 billion mark.

Frankly, I'm surprised it hasn't happened earlier... and it's not happening faster.