Speedplay has done just completed wind-tunnel testing of clipless pedals. It looks like they used a pretty repeatable protocal. They claim and look like they beat out Look and Shimano pedals. Something to bear in mind is that the 3 hole mounted Speedplay pedals performed marginally better than the other 2 pedals, .242 to .243. However the big time savings came from Speedplay pedals mounted on 4 hole shoes, with drag at .237. My problem with this data is the 4 hole shoes. Does any manufacturer even make 4 bolt shoes? Every shoe I have seen for the last couple years have been 3 hole. Still a very interesting test and I am always glad to see companies put out aero data, flawed or not. Then we can at least discuss it on this forum and get some much smarter people than me to dissect this data and make sense of it all. http://www.speedplay.com/...=home.slipperypedals
As an aside, I use Speedplay pedals on my road bike as I simply like to click in or out without thinking. I do race on Time RXS Ulteams for my tribike because they are sweet and I can actually trot in the cleats without slipping on my butt in T1 if I am lazy and don't want to do a running mount, or can't, because I am not allowed (many races).
People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf. George Orwell