The highest priced ticket I see for the two-part London on a weeknight is £190, which is roughly $262. A Premium Ticket on Broadway, for one show, is $269, or $291.50 after fees. Even before the change, it was a lot of money, not to mention commuting or hotel for two nights.
I do think a bit of the so-called ADHD argument holds up, in that the London production does four two-show days, and seems to do quite well with them. Even though some of the biggest tourist shows on Broadway have tried to do matinees besides Wednesday and the weekends, audiences just couldn't grasp the concept here yet.
"Hey little girls, look at all the men in shiny shirts and no wives!" - Jackie Hoffman, Xanadu, 19 Feb 2008