Woods, who is set to make his PGA Tour return at the Hero World Challenge in December, has won more WGC events than any other golfer in history.
With 18 wins in these competitions, he has 15 more than the next closest (Dustin Johnson and Geoff Ogilvy have three).
McIlroy was asked why Woods found so much success in these events and he did not hold back.
"Honestly I think because of the no-cut format," McIlroy said. "I think that's probably a big thing to do with it. You play with a little more freedom.