What is the correct ammount of time?

I keep hearing "Take at least 30 minutes to eat each meal"...I am only able to eat 3 or 4 small bites at one meal,surely I am not expected to drag that out over 30 minutes. I normally need at least 15 minutes to finish a "meal". Does that sound right?

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.