Oh Reily?
Check out the publicly available info. There is quite enough processing power in that facility to do the job.
They are recording and key word flagging all electronic communications.
They are not “listening” to all of them, that is to say there is no human in the loop reading your emails and listening to your calls, but...
As you say, there is both more and less to this story than meets the eye.
and that's all I am going to say!