I had suspected for a while that my performance in the glycotic pathway wasn't impaired any longer by carb restriction or fasting. Keep in mind that I've been doing this for several years now, and I did notice some drop off in ability early on. I strongly suspect that there are some more long term adaptations occurring within IF/low carb, but I'm not sure exactly how.
I am going to be doing quite a bit of sprint work this summer, coincidently, so that might be a good time to test performance during more frequent workouts. Of course, fruit season is almost here....