Yes, it does. Give 1-2 drinks in an hour, even with a meal, to a first-time drinker, and they will have a buzz. Experienced drinkers have a mild buzz also, but it is less noticeable because they have elevated tolerance. Alcohol affects the body from the first sip.
You are gonna have to back that statement up. Most children over the age of 6 in this country have had a sip of alcohol from time to time. When do they become "experienced"? Is it after you've had your first black out or what?