Dark Eyes isn't, but did you see the dance team skating to We Will Rock You? Or the five other pairs skating to rock? Or the juniors skating to Meghan Trainor?
Modern-Music-To-Make-You-Look-Edgy-And-Different is definitely the interpretation de jour. (Well, the Meghan Trainor pair weren't edgy, but that was about as modern as a waltz gets.) I prefer a nice traditional waltz myself, but it would get boring if EVERYONE did that, so as long as it's actually a waltz, it's fine by me.
The one infuriating thing about this pattern, however, is that not a single team has used Roses From the South and that is upsetting. It is CLEARLY the best waltz.
Kidding. Matter of opinion.
The team skating to We Will Rock You are using it for the march part of the SD which is one of the required rhythms this year. For the waltz part, they are using a song that absolutely conforms to the style and construction of a Viennese Waltz, even though it is a more modern composition. Viennese Waltz does not and has never equaled Strauss and only Strauss.