or are there still some naughty boys out there who like to play fast-jet-jock at 330 KIAS?
Yes there are, especially when ATC tell you to do so (which they do here regularly
). 320KIAS til 15tm. No sweat, with time for a cup of tea after the checklist, which also helps to clear the ears that are now popping profusely because you just caught the cabin!