It is possible that with litlle rotation of the wrist, the force of impact focuses more on the index, ring and middle finger and the result is better sound.
There are also different ways of changing the wrist position... Personally, I make slight inward rotation of wrists when playing tones, not slaps. As I have found out, this gives tone a litlle bit fuller, plump sound.
As davidognomo pointed out, it can potentially be damaging to the wrists. I also had some minor pain in my right wrist at one point, but can not say if it was from extended use of computer mouse or playing drums or even combined. Few weeks abstinence of playing, during my hollidays trip didn't help, so I am leaning more in favour of mouse usage inflicted injury..