I think the consistency has come from being a bit lighter. Like he said before the Tour he lost 5 kilos! While I don't think it is that drastic cause he'd likely have died if he had lost 5kg. He might have put on a bit of weight after the Vuelta to help with speed,who knows.
He said he lost 5 kg in his spring training, but after his race in the small Frence race he said he was too light to race a GT at that weight and put between 1 and 2 kg back on before the Tour. He likely tweaked that before la Vuelta. What he's going to do between la Vuelta and the Worlds, who knows.