This link is at the same page.
http://www.grandprix.com/ns/ns01510.html
McLaren used the system in Australia and Brazil before it was banned. The main reason, as stated in the link, was that the system was also used to produce differential braking, in a way that it helped the car into turns. This led to the allegations mentioned.
I don't remember if it was Ron or Norbert who said (after the ban): "Better for us. Without braking we should go even faster". Well, they did win that year by some margin.