Many big schools now set up their own individual info sessions, rather than traveling in packs via MBA fair. (I think big schools tend to join the MBA fair for international purposes, but I could be wrong)
At these events, each school has at least one or two people from their admissions office. They will answer your questions (some schools have individual presentations as well) but all the answers to their questions will be really reserved in nature. They will give you standard replies. They will never say you will get in or not based on your individual stats that you provide them on the spot. Their goal is to get applicants interested in their program and encourage applicants to apply to their school. (ENCOURAGE is the key here)