Early closure effect on tours?

[NoMoneyThanks2Disney]

I was finally able to snag a spot for the Keys to the Kingdom tour, something I’ve wanted to do for the last couple years. I now see that my date, 2/8, is an early close day, 4:30. I’m concerned that this will affect the quality of the tour, getting rushed through, etc. even though we start at 9:30, so should be done around 2:30. It says it’s about a 5 hour tour. I don’t want to pay this high a price and get less. Am I worried about nothing? Is there an upside to having a tour that day?