I'll bite, they say "refurbished by canon" and "90 day warranty"
Any chance these are the 1-year and Adorama hasn't gotten the message yet?
Canon, through their Canon store, offers a 1-year warranty. They do so mostly because they can control price there. Out in the rest of the world, your warranty is really more what the box store wants to offer (and obviously Adorama works with Canon for repairs).
So, I'd say there's about a 99% chance it's a 90-day warranty. But, since these are refurbished, there's a decent chance they've been given a round of quality control beyond a "new" camera, so I'd imagine the odds of failure are less