consider as well that the standard DV placed on early Audi models (the same as VW's) were reversed initially from factory, according to another read it states customer were moaning about the flutter noise and they traced it back to the DV being to weak for its intended purpose, as a result they switched it around and got rid of the flutter, from the beginning it was suppose to be reversed but due to design flaws it was changed around, so really if you have an uprated DV and using the correct springs etc theres little difference from normal to reverse
this was found on vwvortex