His head. Not sure how he could get 18 recommendations for that post ... although $5 options would be nice.
If the numbers from RobVanHooren are more or less correct the number is more like 30%. See the post here. Rob's post is literally the first/top post in the "Due Diligence" (which makes banshee's post and the 18 recommendations pretty ironic) section in the Link Library.