length of the hoses, both for CO2 and for the beer lines are the same, and their both regulated at the same temp, about 1-3 celcius. They're both under the exact same conditions, which is why I figured it was the placement of the straw in the keg.
Same hose lengths, same temp, full kegs, etc
Would the straw at the bottom not have an effect? I'd assume that a straw that sits against the bottom would pour differently than a straw that sits a half inch off the bottom would it not?