Fans of the Seventh should consider the Kubelik/New York Philharmonic version. This interpretation contrasts with his earlier two (one, in studio, on DG, and one, live, on Audite, both very consistent, both with BRO, even if the Audite's set sound is not satisfactory), witnessing a change of concept of the work by Kubelik. It seems he is narrating the story of the travel through the night depicted in magical sounds by Mahler (Dear Barry, if you consider the Seventh as "a sort of Mahlerian travel log too", you should read D. Mitchell's article "Mahler on the move: his Seventh Symphony"-you can find it on "Discovering Mahler, writings on Mahler, 1955-2005", Boydell & Brewer).
Timings are on the slow side, but we can't put the question simply in terms of "slow" and "fast", because it depends always on what happens within these spaces of time. Perceving slow as slow and fast as fast means that phrasing, fluctations of tempos, transitions, attention to dynamics and to overall shape and details etc.. failed to make feel us the choice of tempos perfectly logical and meaningful.
Luca