We have never had a "Bad" experience with Cattle Barons and enjoy going there... However I would predict all places on Thanksgiving Day will be very crowded and you will not receive the same level of service (or food quality) as you would on a non-holiday. Our experience has been the worst days to venture out to most resturants are Mothers Day, New Years Eve, Christmas, Thanksgiving, and Fathers Day. One of the few excpetions to this rule may be Bonefish Grill.
Here is a link to some reviews/comments from last year.
Nancy Lopez left something to be desired!