To say I've done a study, no. California, obviously, has a three-strikes-and-you're-out law. Some states have. Laws, obviously, differ from state to state in the United States, plus they have their own federal jurisdiction.
All I can say is that anecdotally my understanding is that the Americans are trying to stray away from this because they've seen injustices that have occurred. Mind you, their three-strikes-and-you're-out laws can also be different. In some states you receive a sentence of life imprisonment if it's the third drug offence.
So it's difficult to compare with respect to this dangerous offender legislation. American comparisons may be a bit of a red herring because we view it as the basic principle of the reversal of the onus and our own fundamental principles of justice that we have in this country nationwide.