Almost certainly, but not unexpectedly. The hours they put in are almost always a template, and then they adjust them up as needed. I've been semi-watching it for months, and I think they increase them almost constantly.
But there's a flip side to that "higher crowds" point. First, more hours means more time you can dedicate to the parks. But more importantly, you can leverage the time to your advantage. If Animal Kingdom opens at, say 7:30, do you really feel like getting up that early? Probably not. But neither does anyone else. So if you are willing to go early or stay late, you can use those extra hours to your advantage. If the hours are 9:00 - 6:00, then you don't get as many "off peak" hours to work with.