Also, David, going to your point about KOIT being more or less an "Oldies" station: If you're talking about stations that have older music as a significant part of their format (combined Oldies, Classic Hits, Classic Rock, or whatever you want to call it), there are 4 stations in the Top 10 that fit the category - KOIT, KSAN, KFOG, and KISQ.
Yes, I'd be inclined to call them all oldies stations. They play far more old songs in their regular rotations than the top stations did when I was a kid. I remember one night listening to KFRC during its early days under Drake, might have been 1967 or 68 and hearing Elvis' "Hound Dog". The next day at school we all talked about it. It was a novelty to hear such an old song (10 years old!) on KFRC. Even when KYA did their "Golden Gate Greats" weekend I don't think they had more than 2 out of 5 songs older than about 2 years.
Listening today to KOIT you're likely to hear something from 1977, likewise KISQ. When I was a kid that would have been the equivalent of KYA, KFRC, KDIA, or KEWB playing something from 1937!
I don't listen to any of these stations much, but whenever I hear KSAN or KFOG the first song I hear is typically something at least 30 years old. I don't hear anything new that I can think of.
Yes, to me they're all oldies stations.