If Iger meant that they could let in 3,000 more people at Christmas because they were more accurately able to know when the attendance was at an acceptable level again, then it is possible that your band is "pinging" something as you leave the park. I don't know how and why they decide to shut parks - I am assuming that it has to do with occupancy figures - in which case, they can't accommodate 3,000 more people unless they KNOW that the occupancy has gone down.
Now, if they do it based on an internal "comfort" number or some such Disney number, they can certainly choose to increase that arbitrary number to say they got 3,000 more people in the park. The more I think of it as I write, this is the only way they can truly say they got these people in since at Christmas, there were even less people with pinging bands than there are now. I call PR spin on that 3,000 number.