Can't speak for other places, but I can say that it is true, here in Israel. There have even been articles written about it in the press.
Leading contributing factor? Stress!
Most men and women serve in the army. Today's army service is far more stressful than a generation or two ago.
More stress does two things, 1 stress is a factor in hair loss, as well as smoking (also rumored to have an effect on hair loss).
Most men go bald earlier than their dads did.
And I can see the results of this, everywhere I go. Loads of young bald or balding men.
Another good reason to end the occupation!