I think such polls should be voted by people who lived at that time. Of course todays youth can't connect much to the music of this bands. Just like in ten years or like even now, some think MJ is over-rated. different era, different times and different people.
thats why "over-rated" is too overstated. Cause i'm sure most of you voted Beatles, because the whole 1 billion albums crap. And they are stated as "the Band" of popular music ever and their music is considered as classic/ever-green, without many of us to understand why.
i like some beatles songs, but can't get really into their music.