Thanks Jlbowden and others for responding. I am hoping some long time Hubbers will also respond, so I can get an idea if things were better before the Hubpages Ad Program. One thing to keep in mind is that when you are running the Hubpages Ad Program, there are fewer Google Adsense ads on your hubs, so fewer opps to make money through them. I think it's 66% fewer Adsense ads.
I did not have much luck with Adsense. The Hubpages Ad Program has been a nice steady earner at a fraction of a penny at a time, but I wonder if I went back to full Adsense if I'd do better in the long run?