Wow...Ok, look, I had my son 5 years ago and even the first time my husband and I had sex afterwards, we didn't notice a difference. I was concerned about it being "looser" and he said it was just the same as it had always been. Most women go right back to normal. Your body is very good at repairing itself, especially in such an important area.
The time that it takes to get back to normal is different for everyone. How big the baby is, your natural elasticity and muscle control....Kegel exercises do help a *lot*. They help during delivery, too, so it's a good idea to start them when you're still pregnant.
This so called "man" you mentioned from that article was probably just an problem looking for an excuse to get out of his marriage.