What is the speed of encryption?

Not a question I ever thought I would find myself asking, nor to be fair finding myself intrigued by the answer. Not even if we got into the hypothetical territory of quantum encryption where those wearing the white coats and bemuse expressions will happily tell you that every possible encryption key can be tested simultaneously resulting in encryption, and of course decryption, before you can stifle the yawn. However, perhaps it is because it is a slow news day or I the fact that I need to get something geeky into my system following the mind-numbing experience that is shopping at Tesco, but a press release from Protegrity Corporation and Teradata managed to get me considering the speed of encryption question.