You can install the image now and just do the updates as they come along, sometimes its small, but mostly its about a 100-300Mb system overhaul everu day or two, but still, if she wants 13.04 now, I can attest to the fact that it is rather stable (had two or 3 minor problems with media playback processes that wouldn't die, but thats about it)..brandspanking new Ubuntu 13.04.