Sorry to disagree Telstar but having observed RYR over the years I can say that RYR do Taxi expeditiously when there is no apparent advantage to be gained.
Even taxiing onto stand at 'break neck' speed. Why oh Why?
However. If you are trying to turn on sheet ice it doesn't matter if you are ten knots or one knot.
There but for the Grace of God....
Safe flying.
Binder