Yes, potentially. I've been told if searching by dinner, it may only provide results withing a certain window (say 5p-8p) so anything before or after may not show. It probably depends on the hours of each restaurant, if their B, L, or D hours fall outside of the BLD timeframe Disney sets forth. I usually search both just to make sure I don't miss anything! If you search by a specific time, it usually searches an hour or 2 before and after that time you specified.