I guess we'll start to see in a few weeks.. I have the cost of a moderate house riding on KNC and the cost of a compact car riding on BitFury. I bought a crapload of BFL stuff, too, but it's likely to be worthless by the time it's delivered.
I know that this argument has been done to death but if you really are putting that kind of capital into mining hardware you would be much better served just buying BTC on the dips and riding waves.
Mining profit potential will be decreasing drastically and we do not know if any vendor can even meet their deadlines. BTC profit potential is much greater with discipline and a good strategy. Just saying