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by torme 5603 days ago
She has a blog post explaining the x's here:

http://www.stubbornella.org/content/2010/12/09/the-hacktasti...

Edit: I also agree with your sentiment. This seems to move away from what CSS classes are intended for, and gives things naming conventions that are tied directly to their internal CSS code instead of to their semantic meaning on the page. That said, I haven't used it either, so maybe it's way better this way, but something doesn't sit right with me.