This is from that UK article .
Doubtless directing LuPone presents its own challenges. “I am exacting,” she concedes with pride, “and I push.” But listening to her is a hoot. “If someone has the talent they have the RIGHT to be temperamental. They complained about Bette Midler when she was doing Dolly, but she wouldn’t be exciting if she wasn’t temperamental. It’s only the ones who don’t have the talent and are temperamental who make you say, ‘Just get out of here!’” Who would dare argue?