I use the AW Stats percentage of bookmarkers only to compare my own sites to each other. Yes it does count only IE fav.ico requests, so whether or not you have one can slant things on your results. I make sure there's a fav.ico on the sites where I use AW Stats.
For example AW Stats tells me that 64.8% of the visitors to my xratedtv.com site are bookmarkers.
I'm not sure if I should

or
