On a slight tangent, but still relevant to this, I think, and I am no expert on this, but the Regulator is a shunt type on these bikes, so unused power is dumped through the regulator, creating heat.
I think that the LED bikes have a smaller capacity stator, I wonder if the obsession with reducing power consumption may lead to extra strain on the R/R?. If you reduce the headlight wattage by 70 Watts, that "lost"70 watts is still generated by the stator, and will dump through the regulator..
Happy to be proved wrong, as I am not totally sure about this, but we did have a thread on Regulators a while back.