Obviously, first priority is disabling and not using Viewstate as much as possible, but if you have to, is this worthwhile? Also considering that IIS is gzipping everything for you as well. ViewState is smaller however is the trade off of CPU worth it?
http://www.dotnetcurry.com/ShowArticle.aspx?ID=67
Trying to give a client some guidance based on this.
PS: They are using .NET 2.0