I don't recall Google doing this sort of thing before.
Yea, they've been doing it for a while; I remember looking up Easter and seeing it. You can also get your own IP number now, and various other things. Anything they think they can answer themselves, they're gonna do. I can even plug in "temperature in ann arbor" and get the current weather and the forecast.
Back to AdSense - I continued my text vs image ads test, and I'm not saying anyone else would get these results but... the CTR went WAY up on image ads, but the EPC went WAY down. That continued for two days, which is pretty short lived for a test, but this time of year I have a lot of traffic, so I figured it was enough. So I took the image ads out of the mix. Immediately the CTR went down. Also immediately the EPC started climbing back up again.
Now it's possible that since I hadn't had image ads in that spot for some time, it requires more than two days to get good paying ones. But I'd rather go with the evil I know - low CTR and high paying clicks. So for now, I'm all about text ads.
Takeaways - always be testing, and find some way to evenly rotate ads so you *can* test. I found a nice little WordPress plugin that's so handy I'll probably send the guy a donation.