Hate to be contrarian but "so what" if the pages load quickly? It's all client-side so I'm not sure why this is surprising. Also, other than people who go on a gorge-fest of installing every plugin that catches their eye, I have never had a WP website suffer from "slow" page loading. We are not writing FPS games, here.

Also, if this (i.e. hundreds of .js files which you cannot convince me are not a huge PITA to debug) is the future of theme development...then I'm going to be "done" with WP before too long.