It will not take 2 months to ferment out. Depending on the Yeast choice it really won't take much longer than a regular strength beer. The key to high ABV fermentations are pitching a very healthy amount of yeast (definitely do a starter), oxygenate well, and pick a yeast which can handle the Alcohol.
I did a big triple which came in around 9.5. Femented with WY3787 an it actively fermented for about a week and a half. Bottled after 3 weeks. 2 months is just not necessary for fermentation. If you re bulk aging the beer, then time might help. But that is usually for porters, stouts and such which benefit from allowing the roasted flavors mellow.