In this day and age of litigation, I reckon if the mini-backtrack thingy was required or even a good idea, then it would be recommended by Boeing and also by the Qantas and Virgin training departments.
As this does not appear to be the case, and also considering the increased stresses on the nose gear and the common courtesy aspects, there would appear to be very little to recommend it and indeed much to make it seem the least attractive of the alternatives.
That's my 2 cents worth, take it or leave it, but I shall continue to laugh at those that persist with this foolhardiness.
And if things are that bloody tight, then for Gods sake at least
use the full length!