Every. Single. One. of the people I know who re-located here from another state will tell you it's hard to make friends here. They may not know the term "Seattle Freeze" but they well know the phenomenon. The only people who will deny it grew up here, and even many of them acknowledge it.
Because I'm a loser and have no social skills, I'll blame my shortcomings on the Seattle Freeze so I can have something other than me to blame.
Local: No. People here aren't unfriendly. Maybe the problem is you.
Transplant: Let's hang out sometime.
Local: Umm.... I have that thing at the place at that time.
B: "Oh yeah, why do you say?"
A: "Cuz i looked at her from across the room and she straight turned to ice"
B: "daaaaaaamn she got dat seattle freeze"
A: "Well wtf do i do about dat"
B: "Fuckin' talk to her"