So over 2 million sold and 300k+ people already didn't sub in Jan? That says a lot. It's easy for a big popular IP like Star Wars produced by Bioware to sell big at first, it's what that figure is 6 months-1 year from now that determines the success of the game.
If it is accurate, then that's actually a great retention rate. Especially when you consider that there are a large number of boxes sold who just haven't entered a key yet for whatever reason. This would mean retention of probably 95-100% if they actually have 1.7 million subscriptions as of today.