Watched this last night. One big disappointment for me, no talk with Riccardo. I really enjoyed the little chats on the previous discs, and was surprised to find that this one didn't include one. Especially given his change in interpretation. Oh well.
After looking at the timings James posted above, I'm honestly surprised that they aren't faster. They surely feel faster to me. He also seems to use almost the same tempo through out the entire performance. There is variation here and there, but overall its very much the same. It's also not really dark to light, more light to lighter. I've really enjoyed the everything else in this series, and this one really fell flat for me; I was really looking forward to this one, too.
The orchestral execution is, maybe, the best I've heard for this symphony. The contra-bassoon player is a monster, and a real joy to watch play. The tenor-horn was also excellent; he sounds very similar to the gent who played on the Zinmann recording.
The video quality is excellent, for those interested. I'd be interested in hearing from other who have heard this concert about the mix of the 1st violins. They sounded like they were lower in volume in the mix. The 2nd violins sound wonderful and have a great presence, the 1st's not so much. Even the solos in the scherzo from the concertmaster were very, very quiet. I'm wondering is this engineers at work, or what Chailly was going for.