Wow, I think I'd be more worried about the handling/shipping/fees than the results

I have both mine and my brother's dna samples checked on ancestry.com and there is a slight variance between our samples and that is to be expected. Because of the X and Y chromosomes there are some traits that will be passed down on JUST the male side of the family.
I was hoping that there was more difference between the countries but I also understand why there is so much "fudge room" on these: My great grandfather was SUPPOSEDLY born in Germany and immigrated to New York. HOWEVER, the town he was BORN in was under Welsh rule and by the time he immigrated (about 18 years later) it was under German rule. So when people say he was from Germany - it makes me wonder.
My DNA would/does confirm he was Welsh and NOT German. Until I find actual paperwork etc, I am taking it with a grain of salt but do tend to lean to the Welsh side.