I haven't really heard Stairway to Heaven on the rock radio station I usually listen to at all. They usually play stuff like Black Dog, Whole Lotta Love, Heartbreaker/Living Loving Maid, Kashmir, The Ocean, etc. The only times I actually listen to Stairway at all is when I want to listen to it.
Would I say it's the greatest song that they have ever created? I mean it's up there, but I would always think Kashmir would always be their magnus opus and I'm really enjoying Achilles Last Stand as of late. So overrated to me? Not so much, but it's still a must essential for all people that want to listen to Led Zeppelin.