I live in Maine.
So far this year in Maine, the price is about 2x what it normally goes for. Locals say it's because there's such strong overseas demand (China, etc). The average price of a lobster roll I'd say is around $18.
Contrary to what the article says "it's not making anybody rich" I can tell you the lobstermen who typically sell lobster for $2/lb off the dock are very happy with $4/lb. A friend on a very good day will catch 2,000 pounds, so the extra margin this year is welcomed.