This here assutava sutta
says that significant changes of the mind are seen by the average joe to be faster than the body, but not that they are actually faster:
“Better, monks, to let the ordinary person, in all ways unlearned in spiritual knowledge, proceed from the assumption that the self is this physical body made up of the four great elements, rather than mind.  What is the reason for this? This physical body, Monks, comprising the four great elements, is seen standing for one rainy season, standing for two rainy seasons,... for three... four... five... ten... twenty... thirty... forty... fifty... standing for a hundred or more rainy seasons.
“But, indeed, that which, monks, is called ‘mind’, or ‘thought’, or ‘consciousness’, that, by night and by day, as other, indeed, arises, as other ceases.  Just as, monks, a monkey in the mountain-side forests, moving itself,  grasps a branch, then releasing that, grasps another, then releasing that, grasps another; even so, indeed, monks, that which is called ‘mind’, or ‘thought’, or ‘consciousness’: that, by night and by day, as other, indeed, arises, as other ceases.