neutrality

I was always under the impression that being colour neutral was a normal thing, I was able to master colour neutrality in about 2 weeks. After some searching about colour neutrality, it seems to me that most people can only start on white. Is colour neutrality really that uncommon?

How important is color neutrality? I make white cross; oll and pll algos on yellow. If I try to use some other color combination my time increases by 30 sec or so.. It feels like I'm searching for 1 f2l pair from decades. Does color neutrality effect\affect (I don't actually know whether to use...