You don't see that hashrate coming?
Why don't you bet against me? That will allow to hedge my investment and will be free money for you.
Get me right, I know how it feels to see diff raising and delivery date moving away.
It makes you think irrational caused by the fear of loosing money, no?
I could argue exactly the same way for btc value increase as you do regarding diff increase:
BTC value increased the last years by xxxx% a yr, and the last 14days by a remarkable % step,
keeping this increase would predict that
~40BTC your mined BTC will be way more money than you paid for your hardware..
Do not take those numbers from the mining-calculator for granted.
When you do some research what's going to be shipped and in which time frame, you will be more relaxed than now.
All this hashing power you fear has to be produced and paid first, and I just do not see how the hw costs for the BTC infrastructure will become more in value than the currency itself.
Comparing amount of BTC at point in time of preorder with expected ROI in btc is the wrong way to calculate things.
You could have bought those BTC at the day you spent yours and you could have paid in fiat as well.
Keep in mind mining is sth. else than speculation, as there are downtimes, fires, broken parts, noise, heat, electricity, hw/sw issues,...
If you love dealing with hw/sw this is a great hobby, for getting rich you should not start mining at all but speculate instead.
So if you're unhappy with your investment and you cannot get a refund, how about selling your pre-orders on ebay like those BFL preorders have been sold. I'm sure sooner or later you can sell them for 5% more than you have paid.
btw:
I've already bet against your HF preorder with my KnC preorder I assume, as I intent to run my device some time
Yours will have a better GH/s per $ and GH/s per W, and in addition this MPP, so in long term I have to be really afraid of your hw as it will still be profitable when I have to switch mine off.