Twitter doubled within a year - top Twitter countries - June 2010
I found these figures in a recent press release from ComScore which came out two days ago. Worldwide growth was 109% from June 2009 to June 2010 which also means that Twitter is very close (maybe they already passed since June) the big barrier of 100 million users.
(Interesting fact that DoubleClick Adplanner shows 190 million users wordwide. The difference is too big to just say this is because of the different methods.)
Asia Pacific tops the chart with 25 million users while Latin America is closing very quickly, the number of Twitter users tripled over there in this period.

Turkey is the 13th on the list with 11% penetration and that is fairly close to the 3,5 million DoubleClick adplanner shows for the coutry.
So Twitter is marching towards reaching hundreds of millions - and although a lot of specialists (including me :-)) said this surge is ending soon - it does not seem like.
Aug 13, 2010 @ 1:32 pm