Isn't there some confusion here between who is fastest in a particular Pool, and the validity of "World Records" calculated to 100 th's of a second when Pools may be imperfectly measured?

A case in point being the huge amount of money currently being expended (stripping tiles, planing concrete etc)to extend London's Crystal Palace Pool from its current 49.98m to 50.00m.....

"The future is already here -- it's just not very evenly distributed" William Gibson