Exactly. The list doesn't say what they do for their money. It also excludes payments made via production companies.
For example, Mel Giedroyc (sp?) has made it on there without her Great British Bake Off work. You'd have to assume that with that she would be challenging CW for female top spot. Likewise Graham Norton's total does not include payments made for the Graham Norton show.
You can see the problem more clearly when you compare like for like. The Today program presenters for example, or news anchors.
The BBC will have to publish it's holistic gender pay gap in the next 6-8 months anyway, as will all companies with more than 200 employees (I think that's the number). It's fascinating and depressing all at once.