I think too a lot of people don't really look the same after 10 years, the validity of many western countries' passports. Someone who looks similar could pass muster in many places. Hell, I've crossed a number of borders where they either don't look or barely look at my photo, both in first and third world countries.

In airports, with airline employees, I rarely notice them comparing the picture, usually it's verifying names match to the boarding pass. The one place I have noticed them doing a photo comparison about 100% of the time is Chinese immigration.