Really? That's surprising. Pray tell, where do you get this information from exactly? Is there a list somewhere?
Lots of lists actually, all telling a different story depending on what someone is looking for.
Heres one example that involves there own system of measuring active players:http://www.xfire.com/genre/mmo/massi...player_online/
Heres one example based on factual data:http://users.telenet.be/mmodata/Charts/Subs-2.png
*Note* Swtor is not actually on this one because the last factual data showed it above 1 million active subs.
Update:Found one for 1 million and above:http://users.telenet.be/mmodata/Charts/Subs-1.png