As far as I know, Saleen is still using the bottom line Hurst shifter coupled to the stock Mustang handle, complete with rubber bushings. It is marginal improvement over stock but can be made better by replacing the handle bushings with aluminum versions or even an aftermarket handle, such as a Steeda, MGW, etc. Swapping out the Hurst with something like a Pro 5.0 and aftermarket handle will net enhanced shifting feel and accuracy.
You can see my Pro 5.0/MGW set up through the link below.