Wolverine: Nerve Strikes?

If you've been in a lot of battle threads involving Wolverine, then odds are you've seen a discussion about whether or not nerve strikes are effective against him.  I've gathered all the instances I could find of nerve strikes being used against him (see below), and I'm going to say that yes Wolverine is susceptible to nerve hits.  Of the 4 examples below only 1 of them fails to be effective.  It is much more plausible that Echo's attack failed due to PIS or lack of skill on her part, than it would be to label the other 3 instances as PIS.     Would do you guys think?  Do nerve strikes work on Wolverine?