No, just your assumptions on difficulty. I don't expect any of these 60 GH range ASIC products to make even $1000 in 2013 alone. By design, difficulty will always bring the cost-to-mine very close to power costs. When it catches up, power costs will be all that matters. Until then, delivery dates before it adjusts are the key importance.
Agreed.
The people who have the view that the power doesn't matter only have it because they have high profitability expectations. The people saying that power is all that matters are expecting very long payoff horizons due to difficulty increases. I think the latter view is safer and also more correct, especially if you're not counting on being very early in your deployment.
Which I think results is another interesting bit to take away from the discussion: BFL is apparently not expecting their customers purchases to pay for themselves for quite a long time. This is fine by me, as it's also what I expect and I mine for fun and to support Bitcoin, and not because I'm expecting to make a a lot of funds doing it... but if you were thinking otherwise you might want to carefully review your expectations.
Of course, at the moment there is still the potential of getting ASIC based miners before they are widely deployed and the difficulty catches up, so thats a competitive factor thats hard to reason about. Though you can probably count on it not happening for you if you're last on a long preorder backlog