I haven't read it in years, but even as a younger person I remember thinking it was somewhat over the top and heavy-handed. Hence when I heard that Perry was involved my thoughts were more along the lines of "Of course" or "Perfect." I could be off on this and I'd like to hear some discussion around this.
I think the "Elvis is hero to most" argument holds some weight--in other words, Shange certainly gave voice to sentiments that weren't really spoken in high places. Colored Girls is certainly the sort of thing you read when you're getting conscious, and it surely is the kind of play that really speaks to young black girls, in an important and significant way. But is it a classic?
This article available online at:
http://www.theatlantic.com/entertainment/archive/2010/03/the-debatable-legacy-of-colored-girls/37926/