This is one of several reports of a similar nature coming out mid- to late-October. The consensus was that roughly half of the Note 7 owners were switching to iPhone:
http://www.androidauthority.com/samsung-galaxy-note-7-iphone-725283/
From that link -
"This new survey would seem to be very contradictory compared to recent statements made by Sprint’s CEO Marcelo Claure, who claimed most of the carrier’s Note 7 customers are turning them in for a Galaxy S7. Another recent research note from BayStreet predicted that 70% of Note 7 owners will trade it in for a Galaxy S7."