As a life long lobster connoisseur, I can state that once a lobster grows beyond 2 lbs, the meat gets tougher and tougher. The ideal size for eating is around 1.25 to 1.5 pounds. You get the best meat yield to taste ratio. The lobster no doubt gained its reputation as a trash fish when people were harvesting the really large ones from beaches where they roamed in great numbers many years ago. Now that most lobsters for consumption are under 1.5 pounds, they are considered a delicacy due to the sweet and tender meat in the claws and the tail.
MiG