And if we discount all the "upgrades" to better view and/or enhanced rooms, my experience has been zilch.

At some of the hotels I frequent, the rooms are:
Deluxe, Premier, Superior, etc. before you even get to the suites
or
Traditional, Deluxe, Premium, Grand Deluxe, Deluxe Corner, Premium Corner, Grand Deluxe Corner, etc. before you then start seeing suites

You can see how it plays out... I see you are a Plat/Titanum/whatever with us and see you are visiting us again, we upgraded you to a Deluxe or Deluxe Corner room or some other non-Traditional labeled room.
It's even more comical when that's what you actually booked. Typically the assumption is that you booked a Traditional room so as long as they give you something different, it's an upgrade by default.