Now that you mention it, I guess they do. One of my corn snakes that I raised about 6 years ago just called me. We talked for a while, he's had a few clutches, he's very proud of his one bubblegum morph. Talked about her for 10 minutes.
Now, to get a little serious, I don't know if they recongize you in the human sense, but there may be a time when your snake realizes that you are the one picking them up. Could have a lot to do with the scent of that person. My male pied seems to be much more relaxed when I'm holding him than anyone else. My male albino is super calm when I'm holding him, but is a little restless when my son holds him.
I guess we'll never really know!
Jim Smith