comScore published some interesting numbers regarding cookie deletion
rates that piggyback into the thread we had recently started about the
difference between visitor counts based on authenticated users and
counts based on cookies:

http://www.comscore.com/press/release.asp?press=1389

I published some thoughts on the release in my weblog where I welcome
your comments:

http://blog.webanalyticsdemystified.com/weblog/2007/04/comscore-study-sheds-new-\
light-on-risks-to-cookie-based-measurement.html

I was a little surprised to not hear any chatter in the group about
this announcement since it basically says that first-party cookies are
** no better ** than third-party cookies.

Any thoughts on comScore's announcement?

Eric T. Peterson
Web Analytics Demystified