The Americanization of "Mazal Tov"

Joining a long line of yiddish expressions that have joined the American vernacular (shpiel, schmuck, tchotchkes), I am officially certifying that the term "Mazal Tov" has as well.

In the past week, I've been to three different Jewish events where I've met non-Jews (does anybody say Gentile?) who have said, totally comfortably, "Mazal Tov!"

Also seen it in email a few times.