The current hand baggage situation may well be resolved by then but there are different restrictions on the outbound transatlantic compared to the internal leg. Some people appear to be checking all their baggage on the transatlantic but only some of it on the internal sector, allowing them access to carry on items.

In fact, a lot of people who are used to only taking hand baggage aren't 're-checking' it at all before the internal leg and taking it on board. Obviously these people are the quickest away from the airport at Orlando.