OK465, WTF was all that about?? Unless the 737 has idiosyncrasies, whether there is a RWXX or not is irrelevant (certainly in my "DC9") in this situation. We use approaches with and without RWXX. RWXX is actually a bl@@dy nuisance and in some cases downright dangerous, because it takes you direct from the FAF to the threshold. That is NOT how the approach is supposed to be flown or charted. The approach is designed to cross the centreline on the way to the VOR, with the MDA (or DDA if you like) occurring as the aircraft crosses the CL; a simple turn onto the runway QFU to land. Going via RWXX means I've got to jink towards the CL then back to the QFU to get lined up.
Many of our NPAs don't have 3° displayed in the active plan (ie don't have RWXX) but the machine flies down the charted profile ie 3° (or greater if designed) regardless, as described by Skyjob.