From what I've read, Zeldman's just an advisor, as is Douglas Bowman from StopDesign. While they are supervising, Apple's web group is still doing the work.
I'm pretty sure that they're aware of the deficiencies of Apple's web site. It is hard to make it load as fast as anyone would like when compatibility with old, crappy browsers has to be maintained.
Apple's site has to look good to everyone, especially users of Win IE, so I wouldn't expect a lean, mean XHTML 1.1 Strict document anytime soon. It would be nice though, and I'm sure that improvements will be made.