Does your cat respond when you call their name?

My cats never come when called! Actually, until recently I thought they didn't even know their names. My friend who doesn't have any cats was over at my house and was asking questions about whether cats respond to their names like dogs do. I told her that sadly no, they don't, and to prove it I called several random names out before calling my cat's name. To my surprise, he immediately turned and looked at me as soon as his name was called! I tried several more times, and each time he only turned and looked or turned his ears toward me when I called his name. I couldn't believe it! So it seems like he knows his name but he just decides it's not worth the effort to come when I call him!