I've personally seen no evidence of this yet, but in the classic slack welcome thread, I saw the discussion below.
Does anyone here know if this is anything coordinated?
I've said in the past that I am not going to allow script kiddies with a DDoS tool to kill Classic. If this is accurate, I will spin up a couple of nodes in the Amazon cloud, and pay for that personally. Good luck DDoSing that. I'm also open to suggestions where I could get an affordable VPS for hosting a classic node that has some semi-decent DDoS protection. Any suggestions?