There's always a pedant. :) You're probably right, but I think that ship has sailed. Projects and companies have been using "realtime" to mean "push" or "update a UI without a refresh button" for years.
I admit naming things is hard. I'm very often pedantic! But I don't think it's pedantic to say, "Hey, guys, this name we're using is kind of shitty."
Well yeah but we should know better. Pubsub != realtime.