How are the 6 friends displayed in the profile page in Facebook selected?

[BDL]

According to Facebook, they're randomly selected. However, I think it must be the last people who viewed your profile or something, because who shows up is way too coincidental at times. For example, I'll see one of my facebook friends on the street / in the elevator or something, and later that night, the exact person repeatedly shows up in my 6 friends...For the past day or two now, it's been the same people showing up. And If I can recall correctly, a year or two ago, they actually were randomly selected every time you refreshed.

So my "answer" to the question is this: I think Facebook has created a way of letting you know who is looking at your profile and are subtly implementing it in the 6 friends area.