Thought you might want to see this
Of interest, the range of the current prediction for Cycle 24 affirms the lower range of longterm estimate, in fact points at an even lower level than that earlier estimate:
NASA - Long Range Solar Forecast
The ultimate test will be the long term prediction covering cycle 25, which holds the greatest potential for affirming or disproving the connection solar cycle connection with global climate.
The Little Ice Age was a associated with a lack of observed sunspots though several cycles, i.e. the Maunder Minimum.