Tom, I have to work on a non-wp (html) site which uses unsemantic. I was curious to GP’s implementation, and saw that your css is 19kb vs 67kb the original from Unsemantic. I compared and saw various simplifications in declaring classes, did not test anything, but before working on it, it is safe to assume that replacing original css with GP’s, things will be ok?
And, of course, would it be ok to do that from your point of view? 🙂