I actually work for Vail and I have heard that before from our higher ups. they had numbers but I don't have a memory. I would say Breck on average probably has the longest but their lifts are faster than some other places but they are the number one winter vacation destination in the world. With Vail coming in second.
Although Abasin after the big resorts close is a nightmare on the weekends. I usually just hang out and drink on the beach.