Not surprised. If thats the only gene they tested, you can get ALOT more awesome data on the methylation cycle and much more with the raw data from a 23andme test for $99. It can help alot with supplementation and treatment, both with making progress and avoiding possible problems.
Dont forget, its a genetic thing, theres a good chance you and/or your husband could benefit from supplementation too. Alot of moms of autistic children implement some of those therapies and supplements for themselves and the rest of their families with a surprising amount of success.