In reference to Madhva’s being an incarnation of Vayu, there is no opportunity for exaggeration in the ‘Sumadhva Vijaya’ because the authentic history recorded in Madhva’s own lifetime has remained unchanged to this day.  Although there are several different biographical texts of other sampradayika Acarya’s, they tend to conflict with each other, or were written a long time after the incidents occurred.   

Therefore, there is either very little or no support from physical evidence.  ‘Sumadhva Vijaya’ was written by a contemporary of Madhvacarya, and does not have to compete with any other text to assert its authority