As a person who grew up in New England, I can't agree with this. My family loved 2 to 2.5 pound lobsters
I remember when 2 pounders were the standard size. My 9th grade physics teacher was from Cape Cod, and he used to get a 15+ pouund lobster for Thanskgiving. When you start getting to the 5 pound or more, the quality of the meat really starts going down. My brother's wife's family are Nova Scotian fishing people, and my sister-in-law's mother makes a great lobster stew, but she uses bodies or whole lobster in the range I'm talking about, depending on price. Truth is, there's probably no such thing as a bad tasting lobster, but the primo stuff can't get too big. Remember, size is a function of age with lobsters, so those big ones get beat up a bit.