I have long been a Glenn Gould fan. I find that he approached performing from a compositional standpoint. By that I mean he looked at the score from the standpoint of what he thought the composer wanted, rather by thinking how he would play it as a soloist.
He is one of the few people who can play Bach on the piano and make it sound like Baroque music. Too many pianists play Bach way too broadly.
I must admit to not being a fan of the music of Brahms. Indeed, I am not a big fan of the 19th century in general. My record collection goes from Bach and Beethoven to Mahler and Schoenberg to Carter and Cage. Plus post bop jazz.
Lately I have been trying to listen more to the 19th century and I have found that by looking at the performers I like in other periods, I have been able to find interesting recordings of 19th century music. I really enjoy Gould doing Brahms' chamber music.
So, straight from the Toronto Symphony's Glenn Gould 75th Birthday concert, in which this piece was mentioned, I bought it and listened to it, and liked it.
Gould merges the piano more with the orchestra rather than contrasting it so the piano is played more softly, as is the orchestra, making the performance more moody and mysterious rather than bombastic and overly romantic.
The comments by Bernstein at the beginning, and excepts from an interview with Gould at the end nicely sandwich the performance, which, judging by the applause, the audience also loved.