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Yes you will be able to.

The whole point of restoring with iTunes to 6.1, however, is so you can save usable SHSH blobs to re-restore your device if anything goes wrong with said jailbreak. After the jailbreak comes out, apple with most likely release an update and stop restores to 6.1. With these blobs, you will always be able to restore to 6.1. :)
 
The @evad3rs have said they would assume it to work, but they aren't testing that method.

YMMV.
 
I didn't bother restoring. I just updated from iTunes. I'm sure it'll be fine.
 
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