I think it is very much an individual thing, and it depends on a multitude of factors, gender being one of them. IMHO, that kind of reporting is really silly.
That being said, my dad passed away nearly 2 years ago, aged 70, and 2 weeks after my parents had been married for 46 years. They had a very happy marriage. My mother is struggling a lot, and it is hard for her. However, my sister and I have the reassurance that she has the practical and emotional coping mechanisms to deal with it.
If my mother had died first, my father would really not have been able to cope. He was deeply dependent on my mother as a soundboard (he talked a LOT), and also for practicalities like keeping the household going, meals, etc.