Not really, among my age group it was true. In the Midwest many of my friends were getting married in college. In NYC, very few of my friends under 30 were married. In fact, I met more married people under 30 living apart (because it used to be tough to get a divorce in New York) than living together. You're right though, that maybe it should say "so few commit for the rest of their lives at an early age." Most of my friends had absolutely no desire to get married before 30 in NYC.

I should also probably add that my statement shows my cultural biases, namely that being committed means being married. There were many long-term couples in NYC who were together but not married.