is there any measurable difference (time or efficiency) in results when carbing thru (a) the gas-in port versus (b) the liquid-out port? The articles say that using the liquid-out port provides "more surface area," but that seems utterly nonsensical. How many square mils does the bottom outlet of that tiny tube provide? Sure, you get a bit of bubbling thru the liquid as the keg reaches pressure (say, 30 psi), but that should essentially stop in a few seconds, unless your keg is leaking CO2. Don't you accomplish as much (or more) by shaking the keg?