Think it depends on what early is.
If it's days, then I'll get out of there.
If it's a couple hours, it's not so much of a big deal.
It depends on where I am, what I'm doing, who I'm seeing, and what the costs are to change it.
I had a two day training in London that was canceled as we were all sitting in class waiting for the instructor, the choices were to fly back that evening if I could, or spend the day with my co-workers from there as an unplanned visit. Because we had all planned on being in the training for two days, our calendars were wide open, so we stayed and got weeks of work done. If however it was just me I probably would have tried to get back home that day.
On the other hand I've had all day meetings end early and went straight to the airport and Red Carpet club and said what is the next flight I can get on?
It just depends on too many things for one straight answer.