yep, from what i understand they are a 'double rex' which causes them to be curly and sometimes patchy. i think they're fantastic and i would love to get one to start breeding for it in my standard rexes. 2crazyfools has an astrex kit a few threads down too.
they are apparently quite rare and desirable to the right people! if for nothing else than they are rather unique looking. i am a person who really loves unique looking animals, so they are on my holy grail list for sure.