Sources said each firm received the Integrated Fleet Aerial Refueling Assessments (IFARA) of the other's bid. The IFARA models tanker operations in various scenarios to figure out how many tankers will be needed. The Air Force uses the assessment, along with fuel and construction cost estimates, to assay how risky the rivals' bids will be. In the last incarnation of the tanker contest, the IFARA was the single biggest risk factor.
Whilst mistakes can happen this does seem rather suspicious.
It will be interesting to see if this disclosure could have a material affect on any best and final phase (if there is to be one).