[Yo-Yo]

No, judging by the way they are faired into the wing, they don't deploy. They're fixed. Also, I don't see them on other Tu-160 photos, so they're not part of the original design.

However, you could be right in that they were added for directonal stability later on in the Tu-160's life.

[LSUfan]

I note that the Russkies use the drogue and chute method for inflight refueling. Does anyone other than the USAF use the other method?