As someone who worked in restaurants and bars for a decade, NO. Unless your server is very familiar with your tastes and knows you as an individual, do not depend on his or her recommendation. If the kitchen wants to push an item for whatever reason (too much was delivered, it's going bad, test-driving a new preparation, restaurant is overbooked and the recommendation is easy to prep), the restaurant will often run a contest for servers. Whoever sells the most of it goes home with a bottle of wine (or free dinner, or bottle of scotch, or whatever).