Incidentally, I heard a story on KQED (SF Bay Area public radio) today that mentioned a potential clue. There are two parallel runways on this heading -- however -- the left runway is closed for repairs and therefore is currently unlit. If the pilot didn't remember this (it would have been included in his briefings and approach charts for the flight, but he may not have internalized it), he would likely have been looking for two parallel runways and would have lined up on the right one, which in this case would have been the taxiway...