They mentioned that Choice Benefits won't be available until Feb 1. Not sure if this is also true of the status extension.
Ah, nevermind. I checked my account and see my status has been extended as noted in post below. If you are looking at your status level on the drop-down box on the delta.com home page, this is often buggy and doesn't always display correct status level. The My Skymiles page should have correct info --
https://www.delta.com/acctactvty/myskymiles.action