As was pointed out in the other thread, you have to look at the breakdown. What this thread is discussing is a $500 YQ on US-SYD. JFK-LHR in biz in November has YQ of $532 (guessing that US-SYD is probably over $500 for biz now, too). $185.20 of it is the evil UK Air Passenger Duty, and $47.90 is the LHR passenger service charge. Then there's a bunch of US taxes on there, too.