Thanks much for your support.
I do hope no one construes my earlier post as adopting either an Anti-Google or Pro-Google stance. I see AdSense as simply being what AdSense is at any given time. What's obvious, in my case, is that my sites running it fit their modeling better at times and worse at times. I can't explain it, although I see endless attempts to do so in this forum, and I don't think we're ever the wiser for it. Some Adsensers have seen much better performance than my sites in these last months. More power to them.
In the years I've been hanging out at WebmasterWorld, I've seen thread after thread decrying a downturn in income, conversions or whatever. Almost invariably in these threads someone pipes up reporting no falloff or a nice boost. That's the inherent nature of operating websites for revenue generation.
Again, please don't attribute bias of any kind to me.