A. Dim sum is considered an early meal, and Boston  dim sum usually means crowded restaurants by 10 AM. Many dim sum Boston restaurants also offer the widest variety of dishes on the weekends. Also, the early bird definitely gets the worm—sometimes when a dish runs out, the chefs won’t make any more. So for the best dim sum selection earlier is definitely better. Depending upon the restaurant, a dim sum meal can sometimes take some time to consume. You can kick back, relax, and take your time sampling different items along with your tea. It is a brunch-type affair that many people love to enjoy on a lazy Sunday.