Miss M wrote
According to a different source within the company all 767 will be converted to WW configuration (sooner than you think) and be transferred over to WW for a few years before returning back to EF again.
Sorry Miss M thats wrong. Flew with one of the flight crew managers on 757/767 fleet recently and they catorgorically denied that. There was a rumour that Boeing were going to pay for the EF 767's to be converted to WW as the 787's were delayed, but that is now NOT going to happen