I got the hardened edition today and redeemed my elite code. I was almost certain it didn't download on my system, but I may have been mistaken.
With my paranoia a few hours later I decided to check my download history, and there's no sign of the elite year membership download, only the elite app I downloaded 2 days ago. Does anyone elses show in their download history? What with elite being broken right now I can't even check if it's applied to my account, however it's certainly used as I can't redeem it again.
EDIT - Ignore this, it's applied as an actual payment subscription! If anyone else is worried check 'My Xbox' > 'Account' and it should say "Call of Duty Elite 1 Year Pre-Paid" underneath your account summary.