With my ds, I ate tons of fresh fruits, drank no soda at all until the 7th month, and then only VERY rarely. I did eat sushi, but I avoided processed foods, food coloring etc all the way until he started solid foods, since he was nursing. He is very, very spirited, did not STTN, ever, until we nightweaned at 15 months, has food sensitivities and is getting evaluated for some issues that might be beyond "typical" 2 year old stuff.
With dd, I have had what I'd consider a horrible diet the entire pregnancy (I mean REALLY bad)....food coloring, processed crap, etc and I finally gave up on avoiding caffeine at around 5 months. The midwife says she is literally the most active baby she has seen but I don't know if it's the diet I had esp in the early months when we couldn't choose our own food (food bank stuff) or if I just produce hyper kids lol. I guess we'll find out soon enough.