Facebook has been re-writing a lot of rules over the last few months. In one, they have redefined growth for an internet company in Turkey. Now we have a new benchmark:
Facebook has 2.8m users living in Turkey.
That is up from virtually zero 6 months ago.
In comparison, Yonja, the largest Turkish social network, reports (on its home page) about 5 million registered members. Yonja got there in 4 years, and Facebook in 6 months.
Now, in both cases we can talk about duplicate accounts, etc., but that's all noise. The signal, however, is clear.