I agree with what you said. But up to 20MH/s, can be as well only 1.1 Mh/s, see the cellphone contracts. You can reformulate as "20MH/s provided BFL doesn't change the initial unit parameters and upgrade conditions."
For sure it will provide piece of mind to investors.
Is this a major concern? I think my reputation would speak a little for me here as I am not out to scam anyone, but instead provide a useful investment option to protect investors against the coming losses of 1MH/s bonds currently trading on the exchange. I will trade any organization owned equipment for BFL's ASIC miners once they are available. Once the exact figures are released and confirmed, I will be able to make a definitive statement.