I listen to this show every Fourth Of July weekend (along with the AT40 20th Anniversary special). I really enjoy listening to it, though I certainly don't know why a few big hits were slighted (the most obvious being "It's Still Rock & Roll To Me" by Billy Joel and "The One That You Love" by Air Supply, which spent four and three weeks on top, respectively). Yeah, they were from the early 80s, but so what? 80s are 80s, early or not.
This show was discussed at great length in this topic: