No I'll take people's word for it, I'll take the 200 MPH with a grain of salt but I'll accept they're moving faster then they look. It's not that important to me. The space station I get because there is a lot of distance between a person looking at it on earth and where it is up in orbit. I know great distances can distort speeds because the viewer isn't realizing the distance being covered.To get an idea how fast the blades are moving look at them with binoculars. Space station is visible at certain times and it looks like it is drifting along across the sky. With binoculars the speed is apparent.