Let me first address the fact that some people feel that there was lesser alcohol content in the wine used in Jesus' time. Granted distillation did not exist, as far as we know.
The distillation process does enhance the alcohol content. However, the fermentation process produces enough alcohol to get drunk. In fact, the lower acohol levels for them would have been the same as our higher levels are for us. Let me explain.
Our bodies produce an enzyme called alcohol dehydrogenase, (AD), which detoxifies the alcohol we consume. It is the amounts of AD in our body, along with how much we have had to eat, that determines our vulnerability to getting drunk. Our size has nothing to do with it, that is a myth. Food in our stomach to dilute the alcohol is important because alcohol is one of just a few things that are absorbed directly from the stomach into our blood, most foods waiting till the intestines for absorbtion. The point is that the body responds to alcohol by producing AD. In the beginning, there is little to none, that why we get so drunk the first time we drink. Through time, our bodies slowly increases it's ability to produce AD. That is why people who have been drinking for years can drink more without getting drunk. The reduced amounts of AD in those people of Jesus' time (because it's production would not be stimulated as greatly), would mean that they would be just as able to get drunk on the lesser amounts of alcohol content, as we are. It is all relative!
Now consider the following verse. Jesus is speaking:
Luke 7: 33 For John the Baptist came neither eating bread nor drinking wine, and you say, 'He has a demon.' 34 The Son of Man came eating and drinking, and you say, 'Here is a glutton and a drunkard, a friend of tax collectors and "sinners." '
There is no way that an honest person can interpret this passage without the realization that Jesus admits to drinking fermented wine. If Jesus did it, it is NOT sin!