This is a great set of recordings. Though, I do get the impression that all the songs (that I've heard so far) were being rushed through. It's just a personal preference, and others may feel quite differently, but I like some retardandos every now and then.
Just a quick note on the 6th (aka the Pastoral); that rousing theme was the music that Edward G. Robininson was listening to while he was being euthanized in the movie Soylent Green (which was to be his last motion picture)