we did the road about five weeks ago- was a real challange for us. Toke us 2 days from San Felipe south. Beside roadconditions wereally were fighting with the temperature - about 50 Celsius.... Make sure you got enough water with you and don't expect to find anything on about 100km south of Puertecitos... We slept at the beach...
All in all - it's defenetly "doable" , just prepare welland enjoy :-)
You can find some pictures on our webside hasta-luego.de (Section On Tour, Mexico)