IF NGC are going to pull out, it's really in their interests to do so sooner rather than later. The effect of that will be to leave the door open for Boeing to charge the USAF whatever they like for the plane.
Boeing have been given NGC's pricing structure for the last bid, but NGC do not have Boeing's.
Boeing wrote and currently maintain the software which will be used to determine the fleet effectiveness value for each bidder
The KC-X RFP asks for an aircraft almost identical to the existing KC-135, therefore the additional capability of the A330 is only valid if it's cost is no more than 1% higher than the 767.
I do not see any value in NGC bidding other than one small detail.. All through this process, NGC have protested and claimed bias toward 767. Boeing have always claimed they are happy with the RFP and acquisition process, therefore, if NGC come in with a lower price, then surely Boeing have no grounds for appeal?