Letting the water dry is not a good idea, as water from your home has mineral deposits and when it drys it will etch the paint.
I use:
1 Leaf blower
1. California Water Blade www.californiawaterblade.com
1. Big Microfiber Waffle Weave Towel www.pakshak.com
First i use the leaf blower to blow all the water out of the crevices, grille etc.
Then I use the CWB to squeegee all the water off the car
Then I use the MF towel to go aound and wipe up anything thats left. Voila, perfectly dry car.
One trick for you sk, is take the nozzle off the hose, and let the water run over each panel from the top, let is sheet all the way down. When you take the hose off that panel, it'll be dry.
I do promise you though, that after washing and rinsing well, theres no dirt left in the water ;)