It's interesting to read this -- Our company procedures are to continue straight ahead until clean, and above MSA (3500'). Ofcourse we can deviate from this under radar, but it would certainly be a good 10 miles if not more before most of us would want to start turning, being oblivious to most of what you said above.
If all of us knew this, we would obviously make more of an effort to turn early, but not all of us do and chances are that an engine failure (B737) would cause alot of us to go straight ahead for awhile.... Maybe a slight discussion with our operator would be appropriate to ensure not getting into a big mess once the sh*t hits the fan.
Thanks for the info -- I certainly will suggest at least the 30deg left from now on, and then control the problem asap, and be available for further left turns....