I still see young kids walking around with the same Nirvana t-shirt with the yellow smiley face that I wore in middle school. So I imagine Smells Like Teens Spirit is recognized by teenagers today. I've heard a lot of people say that's the song that started the 90s.
Also, it would be interesting to normalize this by noting whether or not the song appeared on Glee. I'm fairly certain that's the reason for the Losing My Religion being so recognizable, I wonder how it compares to a song like It's the End of the World.