Well I never heard them called that before...
I've know them as a 'Shataff', obviously the growing popularity of them has called for a name change that doesn't affect peoples sensibilities...
Had one in our bathroom for many years as the wife likes to be clean.
In the great toilet paper wars (shortages) of last year I was in a supermarket where a woman who was complaining about the lack of such paper was told the get a Shataff installed. Not only was she horrified, disgusted at the suggestion she also extremely abusive to the suggester, so much so that the store security had to escort her (and the suggester) off the premises.