Oops... that '2' should have been a '3', as in "30 NM". Dyslexic fingers.
Let's not argue about my 'arguably'... whether the best is Heathrow, Shiphol, O'Hare or Kalamazoo, the fact remains that the current holds for Dubai are a disaster, and the marathon cross country vectoring ex the holds, all too often at speeds that demand flap extension, incredibly wasteful in unnecessary fuel burn.
Hands up anyone who hasn't been asked for 160 knots with 15 or 20 miles to run, and sometimes in level flight? (I know the ATCOs do their best to achieve the very do-able 180 to 10, 160 to 4, but it doesn't always work when things start to go pear shaped.)
In a 773 close to MLW, 160 knots involves extending the gear, which is damn near the poor man's fuel jettison switch.