A car transfer from/to airplane is the biggest advantage of FCT. Security screening there beats by time any other line in terminal and the passport control is in FCT if needed. About spending the time there, I am sure every person has his/her own reasons. My last time there was 1:30, next could be around 5:30 if I will not rent a Porsche for 3 hrs.
Hopefully there will be Olympic 2016 duck.Already starting to think that the LH duck is a status symbol