No, it's what you say when you enjoy their work.
Two spins through and I'm putting it right next to Ex Military. Shit is dope.
RE: Yeezus/Death Grips, they were most likely something that influenced Kanye but I think that influence is exaggerated by fans. If you look at the people he worked with directly--Arca, Hudmo, Evian Christ, Gesaffelstein--and sampled it's the same sonic space as Death Grips. Aggressive, abrasive, industrial hiphop. &&&&& and Waterfall are both insanely good releases that touch on the same elements as DG. Kanye wasn't shy to reach out to folks directly to integrate their sound.
I wouldn't say that sound is mainstream yet, but it's definitely not strictly underground. Death Grips are a known commodity in the marketplace the same way Arca (FKA twigs collaborator, who is soon to blow up) and Evian Christ (GOOD music signee, currently touring) are. Guys like Untold are getting bookings off that initial wave. The next two years we're going to see more and more of it creep into the work of popular artists and in the public space in general.