I chose shot time based off the standard that was already established by Aquanexus
back in the day. I'm not sure what standard iSoaker uses. I think that in the past - like 10 years or more - range was not as important as shot time and output. Most battles were soakfests and people frequently got in each others faces or did hit and runs. This is why the XXP 175, XP 105 (riot blast), and other blasters were really popular if you look back at some of the old sites - which if you haven't done I recommend because it's cool to see how water warfare developed and how the community has changed over time.
While I can't speak for everyone I do know that in 2001 there began a shift to long range engagements. We had already reached the maximum soakage you could dish out with guns like the Power Pak, Monster XL, and CPS 3200, (check THIS
guy out) and naturally the emphasis shifted to how much you could soak your opponent without being hit yourself. By late 2001 the Water Militia in Virginia, run by former community member xNeverFaceDefeatx, and my Red Scorpion Commandos had begun fighting "one hit kills" games. Dominator War II
was the first full 1hk war that we are currently aware of. It was pretty epic. Although there have been plenty of soakfests since then I think that a lot of people still choose to engage long range based off of the changes that were seen with big name teams like the Ridgewood Militia, Water Militia, Red Scorpion, etc. Similarly, I think that there are many people out there who don't know about Dominator War II who came to a similar conclusion based purely off the fact that once you hit 11 or 12 being hit by giant streams of water is no longer scary unless it's a) freezing cold out or b) you're fighting a fire hose; so the emphasis becomes who can dish out the most without getting soaked themselves.
Most of the guns that you'd be using in any substantial fight aren't going to have any different shot time than what is written up on Hydrowar at 70% because you're going to be using a CPS or something similarly high powered like the SS 300 which tends to shoot air/mist before it drops to 70% range. I will go back and reexamine the high powered air pressure Water Warriors, XPs, etc. that I can to see what the difference is, because you're right, that may make a difference. With smaller guns like the XP 20, Water Warriors Cricket, etc. there will definitely be a difference.