no, with google's proposal, the #! links are all from the site root, see Lifehacker and Twitter's implementation. So these ugly half and half URLs never exist, and you're not paying a double request price
ah you're right, and yes that could possibly introduce the issue of redundant work done on the server depending on the implementation. However the two major implementations I've seen (Twitter and Lifehacker) use it from the root and so dont have that problem.