A lot of pitching a tarp has to do with wind direction and the way the ground slants. Within these two constraints, is how I pitch my tarp.
Anyway, I suspect that using a RayWay tarp (A-Frame), it would be best as shelter against a side wind. Here is the address to Jardine's web site: http://www.rayjardine.com/ray-way/Tarp-Kit/index.htm
Note that his ridge line is set up level, or close to it. This means that set up with the wind at your feet, it will blow through with no effect on the wind...well, he does use beaks to compensate. His tarp is also wider with little space against the ground.
Mike uses a tapered pitch...About "belly" height down to a "few inches above knee height" at the tail. It will deflect more wind and still provide protection. But with a smaller tarp, his sides are more open, hence his recommendation, at a guess. It is smaller and lighter, but more finicky about setups... Typical of UL gear.