Not sure how you can do MD to Disney in 14.5 hours unless you are flying down the highway. I know in January after my truck break down I went from Rocky Mount NC to Disney with only 3 bathroom stops and one fuel stop and it took me 12 hours running around 65 the whole way.
Well, I sort of agree with their figure.
My house in Maryland is 870 miles to Disney.
Travelling at your speed of 65 miles per hour with NO stops, that is 13.4 hours.
So if they made 4 stops for gas and bathroom of 15 minutes each, they could do it in 14.5 hours. Hopefully they have 2 drivers and can sleep in a moving vehicle - I can't. I'm pretty close to Virginia, so I will assume they are driving faster if they are further north in Md. And I hope they always arrive safe - I've seen some nasty I-95 wrecks over the years while travelling to Disney - many of them are RV's.
I use two days, and stay over night on the way.
I rarely leave when I want to (if I plan on 4am it will be 5:30 before I get across the Wilson Bridge and through Springfield) and then I have to stop at 7-11 for coffee and a donut, a minute and a half from home.
Then I see Cracker Barrel and I need breakfast. Usually around Roanoke Rapids, and if I stopped for Cracker Barrel at Ashland I'm stopping for Starbucks at Roanoke Rapids. And the list goes on. If it says Welcome Center on a sign, someone wants to stop.
Then there is that pesky outlet store....
So for us it is a two day trip and we are not in a hurry, nor are we exhausted on arrival. I like the way we travel.
Keep on driving safely!