Nick Stokes has been discussing the Marcott et al 2013 Holocene temperature reconstruction over at Lucia's. The climate outcasts tend to think that Marcott's method sucks while Nick thought it sucked less. So after a lot of back and forth, Nick used his surface temperature program, TempLS with minor modifications to average the Paleo reconstructions.
One of the problems with irregular smoothing being resmoothed can be seen in this splice of the Tierney et al Lake Tanganyika lake surface temperature.
My two cents.