It does raise the question what all the mathematicians are doing at NSA, and why they don't seem to have come up with any meaningful results. Suggests they are a waste of money, but then that's all of the NSA.
I suggest all of you check the original material (powerpoints w/ screenshots). A lot of people here suffer from the action movie mentality where they think the NSA is not like any other government agency, i.e. inefficient, behind the times, filled with horrible middle managers, deadweight, .. you get the idea. Things like the enterprise Java web interface, the CSV mass data export and "genericIPSec_wrapper.pl" can quickly dispel that myth.
Just like the rest of the government, the NSA is not a monolithic entity with no separation of concerns. There are people who clean the floor and people who are at the extreme cutting edge of research.
Don't let anyone convince you otherwise.