When you say you added the coffee at flameout, how did you do it? Did you leave the coffee in during fermentation, or did you just let it steep for a few minutes?
What about your gravity readings? My estimate is that you had about 1.09 OG and you're shooting for about 1.025 FG. With those numbers, I wouldn't be surprised if all you can taste at bottling is the alcohol, and I would leave it in the bottles for at least 6 months till it's ready to drink.
So, with that in mind, I think it's way too early to say what the final result will taste like. However, I would say that you'll get more of a chocolate flavor in the future if you use your cocoa nibs and baker's chocolate in secondary, and not boil it at all. Honestly, though, I've never used either.
What does it taste like now?