#Parent Themes There actually is nothing wrong with the parent/child theme model. I strongly believe that the only kind of theme that should ever be distributed is a parent theme - so clients/devs can create and modify a child theme on top of it.
But I have a problem with developing on top of a parent theme if the child theme is meant for general distribution. Child themes should never be re-sold or distributed.
If I'm planning to build a theme for release, starting with an existing parent theme and building a child theme is a really bad idea.
Working with the popular theme frameworks is just an extension of this problem - i.e. using Genesis or Builder as a generic parent theme and building a custom design as a child theme on top of it.