True enough. I didn't much like their choices either. But most of the surveys I've seen of the "greatest" music/songs whatever are heavily biased to the 60's.
For those with a lot of time on their hands I recommend the following YouTube video playlist. It covers music from the 60's through 2013. The best comes first.
“The 1000 Greatest Songs (1960-2013)”
Didn’t have to go very far down that one before I ran into some things I really don’t like.