I've just had a look at VII reviews which include the GTX1080/V64 (You'd hope with current results)
I'd say my V64 still trades blows with the GTX1080 exactly the same at launch.
I think the "finewine" lark is really only a thing for the R9 290/R9 290X/390X/390 and when the 7970 surged ahead of the GTX680, whereas at launch they traded blows. Albeit some of this was done with a soft relaunch of the card.
Is a Fury X now a 980Ti killer? Fury X seemed to die an absolute death and is basically never heard about, yet it's later GCN that the former cards I've mentioned.
Sure, we can say that AMD might gain more percentage over time. But I'd certainly say finewine's a rather overhyped concept.
Of course there's always games that are the exception. But that's called cherry picking.