I'd say a good 95% of the time I never use turbo. Can't stand watching people blast the trigger every time they catch a missed shot, powering down to the other end. It's just not basketball - not every team plays like the mid 2000 Phoenix Suns, heh heh.
I hate the animation, looks crap, makes the game look arcadey. I much prefer the walking up, smooth hop/skip jog animations, they look legit. As soon as you press the trigger, the players head jolts forward like a bird and goes into road runner mode.
Alas, it is indeed needed in the game though - I can't count the number of fastbreaks i've ruined playing online just because of my stubbornness to look sim, but then - this is why I love offline.