I made the mistake of disputing a claim on Facebook that a certain design of parachute drifts less than other designs. While my statement that as long as the descent rate is the same, the drift distance for any two parachutes (on average) will be the same is true, I jumped into to comment when it really wasn't necessary. Then I compounded the issue by bungling my explanation for why the style of 'chute can't affect the drift. Although I apologized for sidetracking the post, some there labelled me a troll. Since Facebook isn't a very good platform for that kind of discussion, I'm posting here in hopes of making things clearer.