Sure. I can understand why people might level that criticism. Horenstein is more taut and forceful than Kubelik. Bernstein is more glittering and angst-ridden. Walter nails the heavenly stuff and Gemütlichkeit thing. Barbirolli's Mahler is more humane.
But this is what I like about Kubelik: To my ears, nobody has a better grasp of Mahler's "symphonic line." When I listen to Kubelik's Mahler, the music has a coherence that I don't hear from anyone else. Rather than jumping from episode to episode, there's a kind of through-line, a path. Not that I'm reading the score. I'm talking about the vibe, the feeling of having traveled from one place in the beginning to another place in the end -- a sense of meaningful movement, of procession and continuity. ... That's one reason why I love Kubelik's Mahler so much, probably the biggest one.
Absolutely! For me, that's another desert-island Mahler disc.