I.e. are we 80% of the way by the calendar, then if so, as measured by when? We're only about 66% of the way through the current year. Is it that they are 80% of the way through some final totally defined training or tuning procedure? Not likely. And it is 80% of the way to AGI, which is vaguely defined as that which can "outperform humans [by how much? what proportion of humans?] at most [how much, exactly, again?] economically valuable work [what work is not economically valuable?]."
Call a spade a spade, the 80% thing is 100% total bullshit (in the Frankfurtian sense, i.e. it is completely unconcerned about truth, and is all just about generating feels).