Couples who delay having sex get benefits later

This seems the kind of stats that ought to ggo into sex education and relationship education. My question is whether it actually will find its way to the curriculum ...

Couples who delay having sex get benefits later, study finds:
"A statistical analysis showed the following benefits enjoyed by couples who waited until marriage compared to those who started having sex in the early part of their relationship:
* Relationship stability was rated 22 percent higher
* Relationship satisfaction was rated 20 percent higher
* Sexual quality of the relationship was rated 15 percent better
* Communication was rated 12 percent better

For couples in between -- those that became sexually involved later in the relationship but prior to marriage -- the benefits were about half as strong."
The researchers, if the report is accurate enough, seem to have spotted some of the most likely issues in their methodology. The issue may be whether the actual questioning was fair-enough ...
However, like many pieces of research, the longevity and plausibility come down to whether there is a good hypothesis as to why. The article seems to put a finger on a likely runner for that: energy/time given to developing the relationship well-roundedly.