None of this lines up with the statistical reality that the most of the decrease in births are not from the 25-35 age range -- its from the 15-25 age range. It's not that everyone suddenly developed NPD, it's simply
1. less dating
2. Less teen pregnancies.
Wrote one of those columns where the reaction is half, "This is the most ridiculous thing I ever read" and the other half is, "This is all obviously true."