Is there some cache going on? On my first attempt, there is a 5 second delay. When I try it second time immediately it works without the 5 second delay. But if I try again after an hour, 5 second delay again!
>>yohann+(OP)
Safari seems to be caching it for me, but I can reproduce the delay every time with curl - so long as the user agent doesn't include the string "curl".