From 1987:
http://www.ncbi.nlm.nih.gov/pubmed/3627925
Ten European subjects made significantly more errors in recognising Asian faces than European faces
http://pss.sagepub.com/content/16/6/440.short
Koreans who grew up in Europe recognize Asian faces much worse than Koreans who grew up in Korea, and Koreans who grew up in Korea make mistakes in recognizing European faces.
It's called the "Cross-race effect": https://en.wikipedia.org/wiki/Cross-race_effect
OP seems to be American so I'd wager that his/her wife is, too.
From 1987:
http://www.ncbi.nlm.nih.gov/pubmed/3627925
Ten European subjects made significantly more errors in recognising Asian faces than European faces
http://pss.sagepub.com/content/16/6/440.short
Koreans who grew up in Europe recognize Asian faces much worse than Koreans who grew up in Korea, and Koreans who grew up in Korea make mistakes in recognizing European faces.
It's called the "Cross-race effect": https://en.wikipedia.org/wiki/Cross-race_effect
OP seems to be American so I'd wager that his/her wife is, too.