Here's something I've noticed after my many races (chocobo rank 48)
Pay attention to how long its takes for your stamina to start going down after you leave the gates (this only works if you're sprinting off the line) from what i can work out the time difference between when you're stamina starts dropping and distance covered is how behind everyone is compared to the server on average. so if it takes like 2 seconds before it starts going down that's two seconds ahead you need to anticipate turning for a chest other wise you'll end up not getting an item because according to the server you've already passed the chest when you started turning.
However I have noticed that most of the time you'll catch up with whats happening on the sever in about 10 seconds, but it can go out of sync again. Just something to bear in mind.
One other thing i'd like to know is why there is such a huge discrepancy to how quickly people get off the starting line. If we ignore the head start and sprint abilities and say no one has them there is a huge variation in how quickly you accelerate off the line in every race. Obviously acceleration should be taken into account here, but I don't honestly think the current stat numbers that players have (unless you pumped all your feed into acceleration) would make a big enough difference here.
