Barb speed will make you faster than normal people when you're in stealth or detect mode (or using shift to walk). Not sure about the @ command you're using, but POTM has a walk mode toggle in the radial menu, or at least it used to.
Unless it was removed, you'll find it somewhere in the section of the radial menu where you find the other custom things that POTM added like the examine tool and what not. Be warned though, because all it does it essentially apply a slow spell on you, you'll be doing the Baywatch (running in slow-mo) thanks to your barb speed. Personally I just use shift-click or detect mode and wait for others to catch up, sometimes teasing them for being so slow.