I know this an old thread but a few comments, even if they are mostly my own opinion. 
God thought history has prohibited/allowed certain things, IE what animals were fit for sacrifice, what foods could be consumed. If we look at the biblical era we see the Levites were set apart for temple service and to hold the priesthood the were prohibited from consuming grapes in any form. The current Church of Jesus Christ of Latter day saints maintains a lay clergy thru its membership so why wouldn't the same standards apply. Topic 2 of this debate is on what constitutes wine, from a bit of research on the web "search 'wine of the new testament era '" Gives that wine comes from the same word used for any grape beverage fermented or not, the hot debate among biblical scholars is was the wine at the wedding feast fermented, or at passover (leaven or fermented items were prohibited by the passover), some roman sources call good wine that which the EtOH has been removed by boiling or filtration, and that new wine skins were used for unfermented grape must (essentially boiled down wine or grape juice) they further hold that the taste for wine with a high EtOH content as being good or preferred is a modern one and was not held in ancient times. As for the wedding it is the bride a grooms decision on the menu.