Counter-steering is necessary to achieve full-lock quickly from start, since heavy bikes do successfully resist if one does only apply the muscle. Now, the hayabusa, as all sport bikes, has low handlebars, therefore if one approaches the shoulders to the handlebars (to keep elbows at a right angle to avoid interference with the self-rotation of it), one is bound to lose the lengthy lever of the upper-body extending upwards.
More force is also possible with the thighs being tight on the tank (use lower abs) by slightly hanging the upper body to the interior of the corner.
I now remember that doing slalom, I can immediately achieve full-lock without counter-steering, because the momentum with my body passing quickly from left to right, is enough to initially force full-lock before the engine starts straightening the bike, and this is a very welcome occurrence, since the next corner is to the opposite direction.
But in parking places or daily city traffic or limited visibility, one is bound to improvise and expect the unexpected, therefore, if there is a small time frame to perform a u-turn with the hayabusa, I see that ALL means are needed.
I guess that closed track techniques cannot be applied per se in daily riding, because the accompanying conditions of a race (rehearsals, visibility, concentration, rules) do not exist in public roads.