Does this help to explain xKeyScore? If there have been major mathematical advances in the last 6 months what is the chance that mathematicians at NSA made tho

Does this help to explain xKeyScore? If there have been major mathematical advances in the last 6 months what is the chance that mathematicians at NSA made those advances 2 years ago and didn't reveal? (How many good mathematicians know colleagues who 'dissapeared' into a career for the spooks, I certainly know of some). If so , what's the chance that somewhere in the billion dollar budgets they found enough money to turn advances into practical attacks? And if such practical attacks exist, wouldn't that have made it possible to turn a network level tap (such as has been revealed) into a usable 'full take' system that bypasses the 'going dark' problem... given prevalence of RSA based approaches to cryptography on the net today.