I don't think I said anything about a switchblade, Richard. I said acts like an automatic knife. Mine has a push at the top of the handle opposite the blade (Kershaw calls it a protrusion on the blade itself) and you just push that with your index finger and the blade flies out with lightning speed. They also have a thumb push as well, which only requires a gentle nudge and it flies out the same.
If I pull mine out of my pocket, and push the index finger push, which only requires slight pressure, the blade flies out and you would think it was automatic. The finger push requires the same pressure as the button on a switchblade. I do have some switchblades and these are just as fast.
In fact, some of the reviews I read before purchasing, was exactly what some others had said. The Kershaw safespeed acts like an automatic knife.
Some thoughts from a fully satisfied Kershaw Safespeed owner.