Qwest has confirmed a DOS attach against two of their Juniper routers in the NY POP. I believe they had a UDP attack last week also (maybe on Saturday). This time the DOS was a TCP attack on the 100Mb management interface on the Juniper, leaving the box unable to pass packets, hence BGP stays up and a full routing table but you cannot get anywhere.
The story I just got from Qwest (from a NOCie who was reading from their ticket, so take this with a grain of salt) made it sound like that were flooded with bogus routes from some BGP peer. I tend to believe what you wrote above though. I mean, getting a bunch of bogus routes via a BGP peer doesn't seem like the kind of thing where you'd call the vendor onsite (several Qwest NOC'ies stated that Juniper was onsite) whereas a large-scale DOS might... Anyways, that's the scoop that I've got /me returns to lurking Eric :)