Well, all of you "PRO" racers might not think much about flow numbers, but from the end of the retail chain, that's all the info that is usually given to the final customer/consumer. It might not be the final answer to the HP question, but it will let you know if you are at least working with a decent head or not. Considering what B1's look like when purchased new, I would like to know what kind of numbers a given head makes once the ports are hogged out. Another thing would be to know consistency across all ports. Maybe highest numbers aren't that important, but knowing that all ports are done the same IS critical for performance. And for the money spent, I would want to see my heads flow close to the higher end, rather than the lower end of the spectrum. And yes, I would like to see mid lift numbers as good as possible, too.