4 somes always feel slow for me, especially around the green. I think 3 at golf is ideal.
anyway if a player is slow I teel him.
90% of slow player ar'nt slow shoting golf but are slow in their organisation in many maners for very stupid reasons (bag in the wrong place, chips for the green but forgets .to take his putter for the next shot, doesnt prepare the shot to play while waiting for his turn, notes score on the next tee altough he has honors) etc