When? ...or if? Does that mean that you expect them all to reach 64, but recognize that some may not? Do you have any estimates on how many may not reach this speed? Given that some may not reach 64Gh, do you have any estimates as to how many will reach 80Gh? This is important as the range specified(40-80) is so huge that it covers the distance between a reasonably priced product and a horrible value.
If the board does not achieve minimum hashrate of 64 GH/s the Hashrate Protection applies.
For example: 40 GH = 599€ / 64 GH = 699€ / 80 GH = 699€
Shall I take that as a no?
I do not see how we can have these estimates before we have tested a given amount of boards ( http://en.wikipedia.org/wiki/Statistical_proof )