I am in the minority, I actually liked INISHMORE and HISTORY BOYS equally, wildly different though they may be. Yet at both shows, there was much -- much -- grumbling at intermission. And visible walkouts. Among the complaints: People cannot understand the accents easily, and they grow increasingly impatient when the theater makes them simply sit up and listen; both of these pieces require great concentration. A play like DOUBT, which I also admire, is far more instantly accessible, and its issues set forth very plainly. (Dare I say, it's 90 minutes -- people adore that too -- they can be eating and drinking at 10 p.m.)
But is it a shameful act to leave at intermission? I don't think it is. We pay, we watch, we get up half way through to relieve ourselves, smoke, sip expensive drinks. We can return or not. As an old professor used to say, "the audience is always right." For some, that means getting the hell out before they spend more time.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling