Saying a console can be more efficient than a similarly-specced PC is ok. Saying that a console GPU has 2x the flops of a similar PC GPU is plain old BS - you're helping no-one.
And you don't have to quote Carmack or his cat on that - if you have elementary understanding of what Carmack was referring to you could've said it in absolutely understandable way. Like, for instance:
In contrast to desktop graphics APIs, consoles graphics APIs are very thin abstraction layers on top of their GPUs. This allows consoles to be faster in sending commands to their GPUs. The GPUs themselves are absolutely comparable, though: 1 PC GPU flop == 1 console GPU flop, and there's no way around this.
In a way it's comparable (exaggerated example follows) to you driving your car yourself, in one case, and you sitting in the passenger's seat of your car and instructing a professional driver to drive the car for you, in the other. At the end of the day it's the exact same car, and the difference is in the latency between you deciding what to do and the car obeying.
