HA - that was SO not true when we were there last year.
and it's not a secret.
We stayed at the Poly last year and my biggest complaint was the monorail lines. There was absolutely no benefit to resort guests when it came to the monorail lines. The were packed every night and 99% of the people got off at the TTC. I hated it!!!!!!!!!!!!!!!!!!
Good for you that you found it and that it wasn't crowded, but bad for resort guests - one less perk for those who stay there.