I just finished a flight in the 737-100 (Continental) from KSEA - KSFO as a part of my checking out Captain Sim FSX products in Windows 8. I was 81,400 ZFW with 20,400 pounds of fuel (101,800 GW) and it took a while to reach FL300.

It certainly did not feel like a rocket ship using the 14500 for the static_thrust. It may not be perfect or realistic, but it "feels" better to me. Same applies to the rest of them, although by the time you get 737-200ADV, it feels quite zappy.