Peete,
My wipers were always kind of slow in my opinion. Until I lubed the
rotating arm that is. Try putting some good quality lubricant around
the wiper stem (where it goes through the rain gutter by the hood) and
see if that helps. I used Lloyd's Loobit which is by far the best
lubricant money can buy IMHO.
Jordan. 1999 S70 Loaded!