and thats great but have a look at the other posts he's made. He starts a bunfight over some load of waffle and then just loses interest. You're obviously quite sensible. You've read the top line and gone "ooh I've forgotten how that affects me" but there are a bunch of loonies who will pontificate on the fine points of tyre speeds and ground effect and climbing into a negative wind gradient and degraded 2nd segment climb gradients and all the while this bloke it constructing a post about whether its safer to fly an ILS inverted because you can see the ground more easily..
(hang on, that might be a good idea..)