Make a Stalker with Swipe, the first claw attack, and put it on auto, then go fight some enemies. It does not have anything near 75% chance to hit. More like 35-40% I would estimate. It is not uncommon for this power to miss 3 out of every 5 times you attack an enemy.
Make a Spines Stalker, and take Barb Swipe, it too has an abysmal hit rate. (This is worse for Spines guys, as their third attack is AOE with a long timer and a horrid enduance cost)