Yes I agree.
I'm also on the earliest setting. Often get a call when I am just about to enter a corner. Especially tight corners at the end of a straight are complicated to catch for me without a loosing a lot of pace or overshooting the turn. Sometimes the co driver says "slow down" really early on a long straight, but then it is still difficult to catch the corner if the information "left" or "right" comes to late and I don't get a call for the distance to the next turn.
I would prefer an even earlier setting about two turns a head. Of course than as a driver you have to memorize where to go. But if you want to go fast you need the infomation on time!