It seems to me that there are two points being made here, both of which could be valid.
Yet, I'm a noob when it comes to draft systems, beer gas, and nitro taps.
Point # 1: "Nitro Taps basically degas the beer."
What about the 25% of CO2 gas (if using beer gas)--does all of the CO2 gas come out of solution right away, as well?
Is a nitro tap the same thing as a "sparkler" for a cask ale?
Point # 2: "Using Beer Gas with regular taps allows lower, or regular, carbonation levels (but not flat), yet still has enough pressure (from the nitrogen gas) to serve through longer draft lines."