The more you push on the analogue stick the faster you "sneak" but if you keep you "listen mode" active you won't go any faster and 99% of the time you will not be detected, unless of course you are playing Survivor... I swear those Infected are cheating. :/
Also make sure you are playing in 60fps, 30 looks so very amazing but aiming and fighting was a little painful at some points.
*edit*
Some Guilty Gear Xrd Action:






