First, besides the absorbing, I find that they move the water better, possibly due to the "little walls" formed by the waffling.
My WW's tend to not absorb too well at the start. It's like they need to be "primed" first. I usually start on the windows. That way I can push a little bit and get the water soaking in. Once I have enough to wring some out, I then start on the paint.
Also, I pull the towel, rather than push it. I hold the corners up and just let the weight of the towel do the work. (I usually end up with a few trails, but I qd after each wash, so they aren't a problem.)
Others have said blotting is the safest way to dry a car, regardless of type of towel, but I haven't had much success with this method myself.