25 - 45 minutes seems to be the range I have had to wait. The 45 min wait is the usual 5-7AM & 4-6PM wait. These lines look enormous but if you stay Left most line going to the N & D gates you'll move the fastest (always breaks into two lines, the right line only breaks into two lines sometimes and gets all the crew and GA traffic) Most the the other time its not to bad.

C concourse can be accessed from the N & D security line so if pick which ever appears shorter. Stay to the Left if you do choose the C concourse line for the same reasons as above.

S concourse, no clue. Maybe someone else can help with that.