NSA themselves have used Dual_EC_DRBG (which can be distinguished from a PRF even if you don't have the 'backdoor key': it's not just backdoored and slow, it's bad - and they know that). GCHQ behaves even worse and is at this point almost entirely out of control.

In either case, I feel information assurance and signals intelligence arms really should never have been the same agency: they are roles entirely at odds with each other and do not seem to even have their own governments' equities properly balanced, nor their recommendations always having been given in good faith. So be cautious drawing any conclusions from their advice.

Unfortunately, that is not the sort of 'reform' that either government is interested in, particularly my own. It's quite depressing, really.