alcohol tolerance

I know 25% alcohol tolerance for wlp 099. However, it brewed an Imperial Stout of 20 liters, which was an og 1.138. Ten days later the FG was 1.082. Of course, I made a four-liter starter. Is the fermentation speed slow at 099? I plan to add one more 099 . What do you think?

Anyone know if people are looking into the genetic factors underlying things like alcohol tolerance, flocculation, and flavor profile? I imagine a lot of these characteristics are polygenetic (not to mention subjective), but I'm not sure. I doubt the NIH is awarding fat grants to study that...