Haven't most classic rockers added '90s -- Green Day, Red Hot Chili Peppers, Pearl Jam, etc. -- already? Pretty sure WPLR New Haven has been playing them for a few years now, and the '60s tracks are down to maybe two an hour at most. (Four an hour today. They're wrapping up a "Twofer Tuesday" and have played two by the Stones and two by Hendrix in the past hour. But they've also played two by Foo Fighters and two by Red Hot Chili Peppers.)
4PM Hour today:
KSLX, Phoenix
AC/DC: You Shook Me All Night Long
Beatles: Magical Mystery Tour
U2: Where The Streets Have No Name
BTO: You Ain't Seen Nothin' Yet
Elton John: Don't Let The Sun Go Down On Me
INXS: Need You Tonight
Doobie Brothers: Listen To The Music
J. Geils: Centerfold
Pink Floyd: Brain Damage/Eclipse
( I don't see anything newer than late 80s this afternoon, but that could be that they have a sister station that straddles active and classic rock, see below)
KDKB, Phoenix
Van Halen: Unchained
Offspring: Self Esteem
Black Crowes: Twice As Hard
Nickelback: How You Remind Me
Ozzy Osbourne: No More Tears
Green Day: American Idiot
Collective Soul: Shine
KLOS, Los Angeles (where it's Twofer Tuesday)
Scorpions: Rock You Like A Hurricane
Scorpions: Big City Nights
Police: Every Little Thing She Does Is Magic
Police: Spirits In The Material World
Steve Miller Band: Rock N' Me
Steve Miller Band: Swingtown
Led Zeppelin: Kashmir
Led Zeppelin: Good Times Bad Times
Beatles: Help!
Beatles: Penny Lane
KSWD (The Sound), Los Angeles:
David Bowie: Space Oddity
Beatles: Here Comes The Sun
Journey: Don't Stop Believin'
Neil Young: Heart Of Gold
Black Sabbath: Paranoid
Stevie Nicks: Stand Back
Allman Brothers: Ramblin' Man
Guess Who: American Woman
Pearl Jam: Jeremy
Billy Joel: Piano Man
Heart: What About Love
Led Zeppelin: Ramble On
Three of four reinforce my gut feeling that Classic Rock stations are more conservative and skew older than Classic Hits. I think they'll roll off 60s/70s in favor of more 80s and 90s only when they see positives. The problem is that they're not likely to get that from the current audience and I don't know that the KROQ generation is moving into Classic Rock stations. We had a thread about this somewhere on the board a few months ago. There's a demo crisis coming for Classic Rock that Classic Hits seems to have avoided.