Bale has been in the best form of his career so far this season, scoring 17 goals to help his side get ahead of North London neighbor Arsenal in the chase for fourth spot in the Premier League and a place in next season's UEFA Champions League.
While Villas-Boas believes the 23-year-old Bale is ready to be mentioned in the same breath as the game's elite players, he does not think Spurs are overly reliant on the Welshman.
"This is always the problem with big teams," he told The Daily Telegraph. "Do Barcelona rely on Lionel Messi? Do Real Madrid rely on Cristiano Ronaldo? I don't think so.
"But the great players have to make the difference. They are the stars and Gareth has been magnificent this season.
"We are fortunate to have players who can be decisive on those moments."
Villas-Boas also played down the furor over Lyon president Jean Michel Aulas describing Tottenham as "Les Rosbifs" (a derogatory French term for the English) ahead of Thursday's Europa League clash between the sides.
"He is a very, very charismatic leader of Lyon. It's not because of his words we're going to lose the concentration on our objective," Villas-Boas said. "We're going to face a tough, tough team and what I can decipher from those words is Lyon will be extremely up the challenge and it will be extremely difficult for us."