Sometimes I don't get your theories. If you and I race in Masters Class 60-64, which we will later this year, the one of us hitting the finish first is the one swimming at the fastest speed, isn't it? I agree that their is a difference between individuals, making a 100 meter free in 1.20 more impressive for the 55 year old shorty versus the 25 year old tall guy. Bit still they are both swimming at 1,20. When we compare speed, we compare how fast we swim a certain distance, don't we?