Really Weird Shostakovich

I downloaded Shostakovich's own recording of the Piano Quintet, with the Beethoven Quartet (with whom he originally premiered the work). It's really weird. To describe it as a perfunctory reading would be very rude, so I won't. But the word did cross my mind. The thing is, Shostakovich doesn't take into account any of his own metronome marks. He and the Beethoven rush through the work, with a limited use of rubato, in turn restricting the emotional depth that can be found in some of the more intense parts of the works. Is this deliberate? Boris Berman/Petersburg Soloists give a much more epic interpretation on Naxos, and even the snatches of the classic Richter/Borodin recording that I have had the pleasure to hear (though I've not yet had the opportunity to listen to that recording in depth) were far more accommodating to the potential extremes of contrast that can be eked out of the work.

Historical evidence points to this as an idiosyncrasy that doesn't necessarily merit modelling, but knowing that doesn't make the listening experience any less peculiar.