After reading your blog, I think your Dad played the day right. He realized that you wanted to get some speed under you so he sent you back to get the car. Then when you set off to get it, he made his way home at his own pace. You at the same time got to pick yours up a bit as well. I'd say good call on his part. When together, I would let him set the pace as well. Like it's said above, it's great that you have the oppurtunity to spend this time with Dad. That itself is a pace worth keeping up with.