Portion Sizes

So I recently went to a beautiful and fantastic meal at Watts Grocery with my darling Yoyo. Everything was tres bon except we both left feeling like we had a pound of foie sticking to our ribs. so the question is, do you serve a lot of food, letting people know that for their $23 they really got enough prime rib, or do you use portion control, downprice slightly, and leave them only marginally unsatisfied (because they didn't eat till it hurt) but wanting to come back for more? i'm more likely to head for the latter, but please do weigh in on this.