I've never experienced having problems confusing left and right. The difference fell between 4.1 and 6.0 seconds, which according to stats on the site is between the 65th and 76th percentiles. I did notice some confusion with distinguishing between the left- and right-pointing hands compared to the up- and down- pointing hands, but apparently I'm better than average still.
I remember as a kid not having these problems, then, either, but I did notice other kids who did--I was in special ed. That they had this confusion perplexed me; I thought, How could somebody confuse left and right?
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"You have a responsibility to consider all sides of a problem and a responsibility to make a judgment and a responsibility to care for all involved." --Ian Danskin