There's enough variability in all these dimensions to make the experience totally unpredictable !

Fingerprints aren't always taken on the first use of a new visa; I think it was my fifth time through that the computer decided it was required. The lack of instruction on the process adds to the delay, especially for people who aren't used to technology.

The rightmost line is for GCC nationals and clears down pretty quick. Most westerners join the line immediately to the left of this and hop across once it has emptied.

I reckon on the process taking somewhere between 10 minutes and 2 hours. I haven't been disappointed yet And I always get a smile and usually a "welcome". Maybe I just radiate positive energy