I shoot almost exclusively at between 1/125 and 1/15. Why, because I shoot portraits and thats what I need. In all the different kinds of photography that I've done I've never gone over 1/500 and that includes sports, drag racing etc.
The only people that I could imagine wanting extreme shutter speeds are maybe some kinds of sports photographers.
Even extreme stop action like catching a bullet in mid air is done with high speed flash and not fast shutters.