Just listened to the album.... and once again it just flies by!
It's probably the "fastest" album to listen to, the easiest one, you put in on and bam, you're listening to Viper King and you're like "did an hour already pass by?" (I feel it most particularly at the end of S2N - "holy shit are we already unto one of the two final epics?")
It's not that the other albums are difficult to get through, it's always a pleasure to listen to them, but you can't "wing" some albums... you have to be in the mood for it, you just can't go "Eh, I have some spare time, guess I'll listen to Octavarium or The Astonishing". With d/t instead you put it on, enjoy it, and it's already finished.