BuddyPress.org

Yes, it simply creates a wp/bp account linked to that user’s facebook profile, so there is no difference in terms of the features users can access.

Not to speak for Peter but I would guess he’s primarily interested in getting his “post to” plugins for facebook, twitter, and linkedin to the point where they are stable. Though he probably does know the facebook API well enough to say “you would need to do x y and z ” to modify the gigya code to pull over the avatar.

This ultimately should be on gigya to fix – I don’t think their wp plugin has been updated in a long while.