Pee to find out gender?

So, i was goofing around online and came across this!! www.intelligender.com Basically you pee into a cup (very similar to a pregnancy test) as early as 10 weeks and presto chango the sex of the baby! The site says it's 82% accurate. Oh how interesing, because usually you can't find out what you're having until like 20 weeks.
You are wondering if I bought it aren't you? Of course I did! It will sit on the shelf in my bathroom until the day we hit 10 weeks (July 28) and then I'm taking it, we'll compare it to what the Dr. finds and see if it works.