Nah, just when we actually are ready, approaching the holding point. Not while still around the corner on the southern side of the intl terminal, like your good self.
So if it used to be written somewhere, but now isn't, shouldn't you refamiliarise yourself with the appropriate procedures?
Can't say I've ever heard the 'ready in 90 seconds'. Not saying some fool doesn't do it though....wouldn't mind hearing it just for the comedic value