Well, Glenn Gould's performance is definitely controversial and no other pianist should try to imitate him. The reason it's acceptable for Glenn Gould to interpret Bach's music the way he does is because he does it so well. His performance is not unique because it's aesthetic but because it's so well thought out and philosophical. There are other great pianist that play Bach - Andras Schiff and Angela Hewitt are my favorites - and they play Bach very beautifully and tastefully, but their performance doesn't resemble the performance of someone that's asking the univesal question of who we are, what are we doing here, where are we going, what's our purpose, especially after listening to Glenn Gould. Of course, this is only my own interpretation of Glenn Gould.
Needless to say, there has been sometimes when I've really not accepted some of Glenn Gould's playing of Bach. I asked (begged really ) my teacher to let me work on Prelude and Fugue in B minor from Well-Tempered Clavier Book 1 this coming semester and a week ago I accidentally listened to Glenn Gould's performance of that. I had a complete different interpretation in mind of that beautiful, thought-provoking piece.