Anecdotally, I've followed these threads for a few years and I don't remember anyone getting an offer without their references being contacted. But again, that's just anecdotal.
Also, Deana usually posts on the Avue site to say when offers will start go out. Generally, interviews have to finish, and the components have to submit names to central OARM to get them approved as finalists, before official offers can be made. They can only make offers to finalists, but not all finalists will necessarily get offers (though mostly this applies to OCIJ; I think for most other components, finalists pretty much get offers) (though again, this is anecdotal based on previous years, and with the change in the tech to add component codes and such, some of the logistics might change along the way).