who are these top grass court players you are speaking of? certainly u cant consider popp, dent and schalken potential wimbledon winners.
look at the points race this year, how are the ppl roddick plays doing?
here is a link, try to find the names of any on this list
just compare the draws of federer to that of roddick, if u cant see the difference watch tennis for a 2nd year and come back.