If you say so. I don't know how you tell.
Because it was a hit and run situation, Werth is pretty good at the hit and run, and he swung on an off-speed pitch. On a straight steal the runner gets a good jump and a seasoned hitter wouldn't swing on a slow, loopy curveball, because Ankiel would have had the base stolen. On a hit and run there is not an emphasis on getting a good jump (you focus on not getting picked off) and the batter protects you.
There's no motive for Werth to swing on a steal there. If Ankiel was stealing he would have been in scoring position for Werth.
So I'm assuming it was a hit and run.