per the recent SF ratings, KFOG's cume is actually down a bit over the last 3 months.
http://www.radio-info.com/markets/san-francisco
Tho' I'm sure their demographics are younger than they were 6 months ago. (The Bone is down too and Alice is up slightly, FWIW)
But the KFOG changeover started happening months before that. (around July, IIRC.) It had a 3.1 by November; I think that's the first time in years it's been above 3.0, though I could be wrong.
What would be useful is if we could get our hands on the ratings for the 10:00 hours.
Also, the most recent ratings listed are for Holiday 2011. The stations that went all Christmas got a huge bump up(namely KOIT - 5.9 to 8.2, and to a lesser extent the SJ station KBAY which went 1.7 to 2.2 in the SF market and 6.3 to 7.6 in the SJ market) at the *slight* expense of just about everyone else (except for the Mexican stations) -- Alice, as you mentioned, looking like one of the few exceptions.
It seems (to my ears) that Triple-A, which started out 20 years ago as a more-eclectic, less-hard-edged variant of AOR -- basically album rock for older folks who wanted to feel "hip" by being exposed to non-threatening new music and who didn't want to hear "Stairway to Heaven" endlessly -- has morphed into a rock-leaning version of Hot A/C. There was a time when Triple-As would have "no-repeat workdays"; now we get the hot hits played every 3-1/2 hours. I realize that the people-meter ratings technology has not been kind to Triple-A, and therefore (theoretically) playing "Rolling in the Deep" 6 times a day is supposed to induce "average" listeners who are jumping around the dial to stay put for 5 minutes. But lawd it's hell on the rest of us.
also worth noting: KGO plummeted from a 4.4 to a 2.8 after their format change.
CHR Pop has become CHR Rhythmic, Hot AC has become CHR/Pop, AC has become Hot AC, Triple A has also become Hot AC, Smooth Jazz has become AC...etc etc. There even was a time when CHR/Pop had "no repeat workdays."