I too am beginning to wonder whether revenue has some part to play in renewal considerations as all my IC stays are always non-corporate rates for Club Rooms or Suites up to £600 - I guess we will never know for certain.
My main issue with the "top 1%" spiel is it fell squarely on its face this year when a colleague with exactly the same renewal date as me got renewed, with fewer nights on all fronts, whilst I got downgraded. Surely IHG must have a rough idea of the number / spread of nights required for RA to define some criteria - I actually couldn't care less even if they decide that it should be 100 nights because then at least if I know my chances of hitting it are nil, I can plan my stays in other brands accordingly. If not anything else it will avoid all the ambiguity and annoyance that many face year to year.