I've been getting them myself after a few incidents.
The first one, I landed around 11:30am, luggage not delivered until around 7:00. It's possible the airline delayed it, I had used curbside check, so I'll give them the benefit of the doubt. That same day, my friend arrived around 5:00pm, hers did not show up when we returned from Epcot around 9:30pm. She called, they said it was delivered! Just then, we had a knock on the door. It was a guy staying across the hall. He had it, he noticed our room number written on the tag. So that was bell services fault.
On another trip, my friend had a split stay. Her luggage did not show up. She asked if it could have been delivered to her second hotel. They said they checked. They gave her a credit for clothes. 2 days later, guess where they found it? Second hotel.
On a trip last September, we picked up the luggage, we were staying at Poly. When we checked in at ME, they said going to Saratoga Springs? We said, no, Polynesian. So they were looking around and finally just changed it to Polynesian. First thing we thought is what if we used the yellow tags. Would they have gone to Saratoga?