Unfortunately, parents won't really understand until they see the work coming home. At my son's previous school one parent (with a major in applied math) loved the idea of Everyday Math. By the end of the year he changed his tune. Too late.
I'm putting words in Barry's mouth (& will edit if I've missed his point), but Barry has said something very similar. When you look at individual pages, the math isn't bad. It's the hopscotching amongst topics and lack of mastery that are the problems.