Except they're not "plagued" with problems. At all. Apple has sold THOUSANDS and THOUSANDS of these systems, and only a vocal minority is complaining. Lest we forget.
They are indeed plauged with screen problems. Never in the past has there been this much press about an iMac screen. It's beyond a vocal minority. These problems affect MANY users. After many returns, some just accept it and settle for an inferior screen.