Does the bathroom cliche rule hold up?

They say going to the bathroom in a film is always a cliche. The character will only be in the room to 1) escape someone or something or 2) use the mirror for an epiphany. Does that mean that movies like Meet the Parents are revolutionary? In modern slap stick the bathroom is often used for a comic accident of some sort. But then, these type of films could just be creating a new aspect to the cliche.
I am almost ready to say yes to that, but then I remember films like Psycho and What Lies Beneath. I am not sure the bathroom cliche holds up as well as some other cliches like: don't have sex in a horror movie if you want to live, or the bad guy's helicopters will always crash while the good guy's helicopter will spurt smoke but land safely, or even malfunctioning light bulbs always indicate trouble.