I was reminded of this because of a comment Quinn made in the creatine thread, recommending a Paleo/Keto calorie cycling diet. (Disclaimer, I didn't check out the link)
There seems to be some controversy amongst the recommendations for sprinters regarding carbs. The Up!Up!Up! book/site says stick with steak, sprinters don't require carbs like our enduro friends, and that's certainly a recommendation I've seen elsewhere.
However, the AIS nutrition recommendations, and a french review study about nutrition requirements for track and field sprint athletes both recommend pretty high amounts of carbohydrate intake (like 5g per kg of bodyweight). Both these resources comment that most athletes get enough protein just by virtue of the high volume of food they are consuming.
I can't find the citations for the second paragraph right now, I'm running out the door and will post in a few hours. But I'm curious of y'alls opinions, both anecdotally and in terms of research.
Personally I think Keto probably works great for weightloss, but is not ideal in terms of performance for sprinters. (We do need those glycogen stores too, even though we won't use them as quickly as enduros) However, I guess there are times where weightloss is more important than maximal performance, so these techniques could be useful. Personally I decided on an approach that cycles carb intake with volume of training. (So my two off/spin days are zero carb, and my gym/track double days have the recommended 5g per kg)