Ad spending stats

Poynter's Tidbits page has a useful link to some useful stats on online ad spending (with the usual high predictions for this year), as well as the interesting quote: "Also interesting in the statistics section, Internet Explorer users are at least four times as likely to click an ad than a Mozilla FireFox user." Probably more to do with the type of person currently using Firefox (techy, more ad-blind) than the technology itself.