Ok. So, is it accurate to say that a "Digital Backup" of my normal, encrypted wallet from my offline computer will contain the deterministic seed?
The digital backup does contain the deterministic seed. But it's encrypted. Which means it's 100% useless if you forget your passphrase or you get hit by a bus and your family would like to recover your fortune. If you've ever forgotten a password, either write it down with the backup, or make a paper backup. So far, I haven't observed anyone lose coins with Armory except for two reasons: (1) Forgotten passphrase (80%), (2) Failed harddrive (20%). All of it would've been avoided with a paper backup.