I can tell you that hockey fans asked the same question about the Stanley Cup playoffs this year, but once they started, and saw the competition levels (well, except for the Washington Capitals) that talk faded away quickly and no one thinks Tampa Bay wasn't a worth champion.
You could wonder if some team other than the favorite had won instead, and in the Masters, if some unknown happens to come through and win, there might be talk of the course not playing up to its usual in Nov. or something, but then, that underdog would always have some negative perceptions about his win (if his only major) anyway, since people look for reasons to knock others down, in all endeavors, including golf.