Well I don't think I've had the opportunity or pleasure of 30 squirting orgasms but certainly upwards of 20. Once at the movies, i was fingered for the entire time and never stopped with the squirting orgasms. I kept wondering when I would run out of liquid (and I btw, am not convinced it's not just pee) but the supply seemed endless. There have been many times I've soaked multiple towels through to the bed and could just keep on cumming and cumming. Hit the right spot (which I believe to be the g-spot which is a bundle of urethra nerves or so the gyno tells me) and it's endless and constant.
Honestly though, there are so many of them that there is no way to even keep count.