Your explanation was simply a story that doesn't necessarily hold water. How long do we have to wait to see the decline? To me the lag shows that the effect has been blunted, making AGW a likely explanation. After all, if the sun can have an effect, why not other sources? The skeptics like to say that scientists are ignoring natural cycles(a big laugh by the way), but they consistently want to ignore the effects of GHGs.
The explanation does hold water, in theory, but that doesnt mean it is true, of course.
As to how long, probably over the next few years, as this cycle (25?) winds down and the sun goes dormant after an abnormally weak peak.
And other sources do have an effect, from green house gasses to the suns cyclic position in the galaxy, to wobbles on the Earths axis.
The thing that most AGW skeptics are doubting isnt that warming has been occuring up untill recently, but whether human emissions of CO2 are the primary driver of that CO2 and if that CO2 increase is what primarily is driving the higher temperatures.
I dont see enough evidence to support such a view except in a very tentative way, and ce3rtainly no where near the certitude I would think necesary to hand over tremendous power to the government and allow government bureaucrats more ability to interfere in our private lives.