That was my assumption when I checked the "UCLA is wrong" button on the form. We only have one downstream, but it's a distinct ASN so that says "not stub" to me.
this ucla fantasy imposing their social model on actual measurements is merely amusing and does little damage. researchers seem to have fantasies about the internet. the $subject breaks all our fantasies about the 'default free' zone. but it also shows that all the bgp feeds in the world only give you the ability to spew bs fast at the nanog podium, and have little to do with reality. but my favorite researcher fantisy is called the gao-rexford model. it assumes valley free customer preferred. valley free means no peer offers transit to peers and no customers offers transit between their upstreams. we know this to be violated in numerous cases. but the really good giggle is customer preferred, when the fact is that some really really large providers prefer peer routes and have since 1948. randy