The UK Ilford service was definitely contracted out in the early days (I phoned once about an order that was slower than usual and it was explained that they were in the process of moving the work to an in-house lab at Mobberley factory, where I later saw the set-up on the 2008 visit).
However, the packing and branding and the high quality work were exactly the same before and after the move, so our friends in the US should have no worries if the same controls are applied.
Does anyone know if they process/print panoramic films (from a 135 or 120 Holga)? Some months back, I inquired at a (somewhat) local photo lab, although they could process it, they could not print it as they did not have the equipment. I did not see any reference to panoramic film on this web site though.