in .61 it seems like the ability lasts for much less time than the tool tip states.  while hovering over a targeted ship, the infocard stated the enemy ship was taking the proper amount of damage for about 3 - 4 seconds, as opposed to 10 - 13 seconds (depending on level) so it was very difficult to get the timing right.  I was able to capture 1 ship during a game against the AI but that's it.

Admittedly, when the beta first came out, I had an incorrect understanding of the ability but after getting help on the forums, I was able to reliably capture ships manually or with autocast.  I hadn't used the corsev in .61 until last night but I definitely noticed it.