I'm probably going to offend a few people here, but creating a website without or with minimal performance optimization is just plain sloppy and uncraftmanshiplike work. Get your act together, or get a different job.
I, too, really enjoy performance optimization but that's an area that is especially hard to break into because many times the client wants something that just works. In my experience as a consultant it's rare that you get a client that cares about performance much unless it's a company like Apple that has a crazy amount of money to spend on making everything perfect (where 'perfect' isn't literal perfection but surely of a much higher caliber than the competition in many regards).
http://diveintoaccessibility.info/day_11_skipping_over_navig...