Fair enough. See, I'm not so bothered by what Karajan did in front of an orchestra. In fact, I believe that he - along with Szell, Reiner, Stokowski/Ormandy, Munch/BSO, and others - set a certain standard that has seldom been equaled since. What I do think is true about Karajan, is that he really wasn't at his best with most standard Austro/German repertoire. Richard Strauss might be the exception to that. Instead, I think that Karajan was at his best with "imported" music: Prokofiev; Debussy; Puccini; Verdi; Honneger; Holst, etc.
Now that DG is going through all the motions of again honoring Karajan, I think it's unfortunate that they're focusing almost exclusively on the standard Austro/German fare. By and large, I believe that you can find many examples of the Staatskapelle Dresden and Gewandhaus Leipzig - with various different conductors - beating the pants off the Berlin Phil. in much of the Austro/German rep. But where in the Dresden or Leipzig discography are you going to conjure up the same sort of Prokofiev 5th; Honneger "Liturgique"; "The Planets", or "La Mer"? That's what I mean by Karajan setting a certain standard, and not so much what he did or didn't do with the Beethoven 7th.
So, how does that apply to Mahler? If there's more Debussy and Puccini to Karajan's Mahler, than there is, say, Beethoven or Schumann, I really don't think that that's such a bad thing. I don't see Mahler as being a purely Austro/German composer. Instead, I view him as the world's first, truly cosmopolitan composer. But what I will cop to, is that I prefer the Czech/Concertgebouw approach to Mahler: woodwinds far forward; a huge violin sound not being a big priority; percussion that play up to the level of the brass (as opposed to Chicago, where the percussion nearly always play underneath their famous brass). It's a style of Mahler that displays more the influence of Smetana and late Dvorak, than Wagner or Bruckner (and of course, Mahler was influenced by ALL of these folks). Karajan always made a big violin sound a major priority, and his oboes dominated over the rest of his woodwinds. But then again, a big violin sound was a priority with Stokowski and Ormandy too. What I think what might have been somewhat unusual for an Austro/German of that generation, was that Karajan was fairly well tuned into his percussion as well. In that sense, the Berlin Phil. was ahead of the curve at that time. Karajan was surprisingly sensitive to all of the fussy cymbal parts in Debussy (distinctions of different sizes and types of cymbals), as well as the different gradations of gongs in "Turandot" (not so well sung), for example.
By the way, I saw Karajan conduct just a knock-out performance of Bruckner 5 in Vienna in 1981. It was far, far better than his Berlin studio recording. This was after he had fallen off a stage in 1978. He was not very limber, but he still conducted Bruckner magnificently.
Barry