Over the years, I've heard the "two forms of wine" story. My best friend tried telling me that the wine Christ drank was not real "wine"- i.e. non alcoholic. This does not hold up well to questioning, unfortunately.
Obviously, fresh grape juice isn't alcoholic, but grape juice eventually ferments after being stored for so long. Given that the ancient Middle Eastern environment was hot and dry, that there was no modern refrigeration/bottling practices, and that traditional living practices had a season for harvest (eating fresh food) and a season of storage (eating stored food), the more realistic and practical idea is Christ drank fresh grape juice during grape harvest; wine during the off-season.
I believe the reason the "Jesus didn't drink alcohol" story gets around is because there doesn't seem to be a way to covey the grays without people taking it too far. In this case, a seminary teacher telling teenagers "Well, it wasn't the same wine we have now." That's much easier than conveying that they drank in moderation, or just small amounts for celebratory reasons, or for whatever.
How many people would take "Drink in moderation" and hear "You can drink! Get drunk!"? "Moderation" is defined differently by each of us, anyway. Give an inch, take a mile. It's human nature.
Wine is wine is wine. Fermented grape juice is alcoholic today, and it was alcoholic then. Jesus Christ, his apostles- they drank wine. The key is they didn't drink amounts of it for the purpose of compromising their minds and bodies with the alcoholic content.