Chess, sorry about the delay but my bud just called me back today.
He say's that not too many painters uses elastomeric paint anymore due to the moisture that can get trapped between the paint and the stucco surface if it is not properly prepared, causing mold and other problems and that most quality 100% acrylic satin paints nowadays will work equally as well while being able to breathe.
He suggested going to two or three different paint dealers such as Glidden, Sherwin-Williams, Color Wheel or Duron and find out what they recommend and go with the preferred paint for your application. Said he thought *maybe* Behrs was OK but wouldn't take too much stock with what most of the home improvement stores suggest.
