I'd never heard of people having cherry pie for Thanksgiving. Even though a side of my family is from California.

The only thing listed in the 2nd link that I had this year was salad and pecan pie. I'm surprised mashed potatoes weren't mentioned. Actually, now I've checked their data file, and mashed potatoes was one of the most popular items. Maybe it wasn't listed due to it not being more popular in any particular region.