This is interesting. EA claims that 2 Million users played the beta
http://pc.ign.com/articles/121/1214004p1.html
EA has revealed that over two million players have participated in Star Wars: The Old Republic beta testing. According to EA, this makes the game "one of the biggest beta tests in history."
The figure comes via the Global Media and Communications Conference, where EA revealed that each beta tester played an average of twelve hours over Thanksgiving weekend. Over nine million hours were played cumulatively during the same period.
EA announced last month that over one million hours were logged during a previous beta testing period. Star Wars: The Old Republic will be released on December 20th, but players can get early access with a pre-order.