Ahhh....the AA and FedEx sim profiles and evaluation process are not similar. I went through both, passed both and got hired at both companies but I prepped a LOT more for the FedEx sim than the AA one.
At the time of my FedEx interview I was lucky enough to be on furlough from AA and working as a sim instructor. I had another buddy on furlough there and when I (and later he) got the call from FedEx we spent every day after work in a different sim flying the FedEx profile. I would say that I put in about 15 hours in actual Level D simulators flying the profile before I hopped in the FedEx DC-10 sim. Overkill? Not in my book.