A few weeks ago Jan Heine had a post on his blog about the aero drag of handlebar bags. He was using max speed while coasting down a big hill to determine that. We were curious about that and asked him how he was measuring speed: he was using an iPhone rather than a wheel sensor. If you looked at this max speed, you could tell it was anomalously noisy. We pointed this out and suggested that if he wanted to continue to use max speed (which isn't really that good of a metric, but it was what he was using) he should switch to a wheel sensor. This is about when he decided to cut off comments on his blog posts.