Leeds spent about 10 years in the championship after coming back up from league one before finally making it to the premier League. despite being comfortably one of the, if not the best supported sides in the division for all of that time.
their income is massive compared to ours, they should have been competitive a lot sooner than they were.
there is nothing to suggest that a spell in league one did anything to help them towards their current situation. in fact it probably delayed their progress