Really? I've seen that term used for quite a long time, since the late 90s at least. Sometimes I see the variations "hardcore rave", "UK rave", "oldschool UK hardcore".
I don't know if folks in the early UK rave scene actually called it "breakbeat hardcore" in the early 90s, but it's a relatively common term for that genre in my experience. Granted, it's been 25 years since the genre was regularly encountered, so it's more of a historical/throwback thing at this point :)