Measured in a similar way to a Cray, it'd probably be the other way, measured in kiloflops or even flops, unless for a specific problem. Useless for most stuff, crazy for a very specific thing.
And I guess it's questionable if this even will offer that crazy speedup for specific things, since there's no entanglement going on (or wasn't, maybe there is now).
Some more reading (which I hardly even understand half the words, let alone the implications):
http://www.scottaaronson.com/blog/?p=639