Right now, it's not up to the user to decide whether to have the silent account or 'full' Joomla account. We hadn't thought about implementing it so the user could skip the profile creation, but will put it on a list of things to look into for the next major revision. This would have to be a setting for the administrator to allow user's to skip that step, which adds a little more difficulty into the implementation, but nothing crazy.
If you have any more thoughts on functionality or implementation, definitely let us know!