On Jan 5, 7:34*pm, Madalch > wrote:
> On Jan 5, 4:21*pm, wrote:
>
> > Natural yeast will quit around 11% alcohol. If your grapes were very
> > ripe the fermentation will stick with residual sugar left.
>
> If he's lucky. *His two carboys wound up with different yeast
> colonies, since one of them fermented a lot more than the other.

You're right. The average is more close to 8% than 11%. Bottom line is
natural yeast won't end up with a dry ferment.