There is no neuroscience to support the assertion that people can outgrow autism. High-functioning autism exists on a continuum of severity that ranges from severe impairment to what amounts to just a few relatively minor traits. For those on the "low end" of the severity scale (i.e., who have a mild case), deliberate and sustained effort/therapy has been known to allow some autistics to adapt to the point where they become
functionally indistinguishable from an NT. That's what Attwood has spoken about. He's never stated that the differences in actual neurology of people on the spectrum can ever be cured or outgrown. I don't mean to nitpick, but the idea that people can outgrow autism is a hazardous and inaccurate claim to spread. No harm, no foul -- just information.
thegamerchunk1,
Judge is right on that the new DSM criteria might exclude you from diagnosis if you were to be reassessed now, so being re-tested may not really give you an answer to your question. If you see that you have managed to adapt well to social situations and are very much like your NT friends and family, then that's awesome. A lot of people would like to be in your shoes.
The online tests you took were all developed before the new DSM that included the criteria change, but again, if you had a mild case to start with and have adapted well, it make sense that they would now score you as an NT, even if you do still have autistic neurology.
How you actually view yourself is up to you.