Agreed! (IMO the ML backlash is more of a XML backlash that carried over to other MLs).

Regardless - A designer that can design for any* framework with standard CSS/HTML is more flexible than a designer that knows HAML, but could't write vanilla markup.

That why I was surprised about the Coffeescript (preferring HAML is a popular opinion, as-is Rspec: yet Erb and Test::Unit are still the defaults).

Edit: I agree that alt. languages/syntaxes in frameworks are nice. Forcing them on people is not nice.