well the first 2 of the FCA painted 763's are in the fleet til mid 2012 and the others til 2014, so there's a possibility of them flying about in FCA colours for another 4 years.....
Not sure if and when they are going to re-paint them as internally nothing has been said, except at the begging of the merger that it will take upto 2-3 years to fully rebrand the airlines...
In fairness it does only say first choice on the aircraft and not first choice airways. All aircraft are marked up next to every passenger door with Thomson Airways titles.