Been mountain biking 14years. Have run loads of different hubs and skewers. Only ever had two skewers come loose, both Hope. Last one involved a front wheel flapping about coming down Stanage Edge. Scary!
I'm happily running their brakes, hubs and seat clamp but will never have one of their skewers on any of my bikes again.
Had Hope Ti skewers for about 3 years and they're supposed to stretch, my mates had hers for 2.5 years and they're all just fine and they're used with Pace RC36's and 38's that have no retention bits on if you're wheel does loosen. I was out with my son-in-law and his front Shimano skewer came loose on Derwent Moor. Not tightened it properly! Can't blame the skewers really can you?