Half your luck :-)
I joined HP just in time for the 'Google Massacre'. Signed up for Adsense anyway. I was equally quick to join the HP Earnings program when invited, as part of their opening the program to all Hubbers a couple of weeks back.
I can't so far construct an honest sentence that contains HubPages, Adsense , Earnings, and an actual monetary amount. (OK, I'm exaggerating, I could cover a cup of coffee; instant, from a jar, that I already have in the house...)
So, not only am I not seeing any fluctuation. I'm not seeing anything at all.
(Only 13 hubs to date though; not ready to give up yet.)
Good luck barbergirl, and may all your future fluctuations be upwards!