If you're six feet tall, 10 miles per hour probably doesn't feel very fast. But what if you were just six inches tall, like a squirrel? Relative to the size of your body 10 mph would be quite a bit faster. This site shows the top speeds of animals, and how fast they would be going if they were your size (ie, what their speed feels like to them).
|Animals: land air water insect||Graph: top speed feels like|