I just loaded the demo for the first time.
Since I had mouselook (i.e., I can move the mouse and look around), I assumed I would move in the direction I was looking. Nope.
Instead, I can use the double right click (which works most of the time), or I have to use the A/D keys to attempt to rotate my body to point in the correct direction.
Am I missing something obvious here, or is that indeed the plan of movement for all players?