No. My mother married at 16, had me at 18, and is now 36. I am very close to my mother, and talk to her daily. I had my own child at 20 and he is fine as well. YOunger parents have more energy. Younger parents are more flexible. My friends who have older parents, many of them didn't go to Disney land or to the park a whole lot. Their parents were too busy with jobs, or too tired. Not to say they weren't cared for, they were, but they saw less of their parents then people who have younger parents.
EDIT: My mother was and still is an excellent mother.She raised three children to adulthood, and all of us are responsible, well adjusted, contributing citizens. SHe was also married. As am I.