Originally Posted by
flyerCO
You're no more likely to not be upgraded, as to be upgraded doing OLCI.
This is simply untrue. There is a finite number of rooms. If a room is pre-assigned, then that room is taken out of circulation and other rooms are free to be assigned to other guests, namely those guests who have not had pre-assignment of their room and thus who inquire at the desk. If even one hotel in the Hilton chain follows such a protocol, then the odds change, counter to what you assert.
And, as I noted in my previous comment, pre-assignment of rooms makes it more work for a desk agent to perform an upgrade - instead of simply handing over a key pack, they have to go into the system, look for a new room, un-assign the old room, assign the new one, and make new keys. This provides a disincentive for a desk agent to upgrade - much easier to just tell the guest that they are stuck with their pre-assigned room.