I've got some concerns regarding accuracy of the info provided....First off, it seems that the tag at the back says "Zonda R"(which actually makes sense)..Apart from that I doubt the Zonda S has downforce of 700kg at 320kph -it has 500kg at 300kph - so this might be another mistake.
Ahh...I've just come across a new article over at Autocar - hopefully more accurate
http://www.autocar.co.uk/news_article.asp?na_id=212946