Labor rates are on the front page of the attached TSB. 1.7hrs for just the fuel pump and 6.6 hours if they have to change the everything like the fuel pump, fuel lines, fuel rail and injectors.
Sounds like the dealership is quoting the 2-3 days because they will work it in as they see fit over those days rather than it takes full 3 work days (24hrs) of dedicated man hours working it.
We took both Jeeps in same day, dealer gave us a courtesy car, we had both pumps replaced and got the Jeeps back about 6 hours later with new pumps......