Assume 5 - 10 minutes from landing to gate. After that, it will depend on (a) how long it takes you to get off the plane (2-5 minutes for 1st/Bus; up to 10/15 minutes for others); how long it takes you to walk to passport control (you could jog it in 3-4 minutes but a leisurely walk is 5-10 minutes; how long the line is at passport (0-60 minutes based on my experience - no way, rhyme or reason to predict IF YOU HAVE ISRAELI PASSPORT, YOU CAN USE THE BIOMETRIC MACHINES, IF YOU ARE ELIGIBLE AND CUT THAT TO 2 MINUTES); and waiting for bags. Recently I have found them to be on the belt by 15/20 minutes post landing. Of course, if border control or customs has an issue, they can always hold you up indefinitely.
So...best scenario you may be out in less than half an hour but usually closer to an hour or more.
Just my experience.