Majority of the Ruth's Chris's are franchised....so I'm guessing it probably differs from restaurant to restaurant.
I found this out by getting three very different "vegetarian plates" in a month in different locations and asked about why it was different. I've found the quality varies drastically between restaurants.
My favourite locations are the Beverly Hills, Bethesda Maryland and the New York (Times Square ish?) locations.
Not too impressed with the Austin location. Eddie V's- Much better.