They say they're cross-browser, but their examples extensively use -webkit- css properties without the corresponding -moz-, -o- or the "vanilla" versions. None of the page transition examples work in opera.
Well, seeing as most (I'm guessing >90%?) mobile browsers currently used are based on WebKit, it makes sense to only include the -webkit-prefixed selectors
even if that was the case, this doesn't make sense. Write a script that adds -o-transform and -moz-transform after every -webkit-transform in your css and you have a good chance that it works.