I have shot one oldish (1863)Purdey thumb-hole and it is undoubtedly slower than top or side-levers, but, to me, faster than a Jones. You have to move one hand down to open the gun. Personally, I grasp the barrels with my left and use my right thumb to push the lever. Still, if you don't need a quick third shot, it's both fun and makes for a racy look. I like it.