This is the "fact sheet" in question: http://pastebin.com/5d7rHmYe
Instead of "guidelines", I would love to see actual numbers:
The NSA collected X,000 Terabytes of Information in 2012, consisting of X,000,000,000,000,000 records. At the end of the year, 2TB and X number of objects were kept, and the rest deleted properly (data actually written over).
That would be so much simpler and better.