In Australia we now transition higher, I use around 200’ before going into low tow.
I have flown high tow at many overeas comps and still find low tow much more stable.
The only time I fly high tow at home is on long cross country tows where I also pull the gear up (nose hook only!) and let the tug pilot accelerate in level flight.
The issue of tug pilots ignoring what type and weight of glider behind them is much more of a safety issue than the simple high/low equasion.
(I am a tug pilot too!)
Tom