Ben,
I am not convinced they last longer in Fords, they are just harder to change. Maybe the diesel pumps in Fords last longer than their gas submersible in tank pumps that fail, too. I think it is more that electric pumps isolated from the engine are more prone to failure than engine mounted mechanical pumps. My '91. 5 had the engine mounted mechanical pump and it was not problematic and it pulled, not pushed fuel from the tank just like the electric one does. I am not quite sure the issue is as simple as pulling or pushing fuel. I was told the electric pump was used in place of the mechanical pump to make fuel filter changes easier as there is not the need for the mechanical handle to prime the system and purge it of air. In actuality the old spin on filter was much easier to change than the cartridge type anyway. In many ways the new set up is a step backwards and less reliable. But then I understand the fuel pump is a minor issue compared to the new Ford 6. 0 engine's teething problems. Too bad, I do like the Ford crew cab and some of their E-450, etc. bigger than one ton trucks.