I more or less agree with you here. Just wanted to say that if you actually watch Bolt winning his last two Olympic golds, you'll see that over 10-20m he's nothing special compared to the rest of the sprinters. Bolt's strength is his ability to continue accelerating and eventually break away from the pack in the second half of the race. So we're talking around 50m before he actually really distinguishes himself from the other best sprinters. Obviously Bale and Ronaldo aren't at the standard of those other sprinters, but over an initial 10-20m, like you've said I don't think the difference in speed would really be significant. They're fast enough to skin virtually any defender when the space is there. For what it's worth, I just had a little google and apparently Bale ran 100m in 11.6 seconds when he was just 14 years old, presumably he has only become faster. That kind of speed is more than enough, having even faster speed would of course be nice, but as far as I can see it's entirely unnecessary