I've read that oxytocin has helped those with autism. Is that true?

Under study. There are reports that individuals (mostly adults) with asperger's disorder and high-functioning autism who use inhaled oxytocin so that it gets into the brain find themselves feeling more inclinded to be social, at least for a time. No studies suggest permanent changes, and it is unlikely to be a "cure" for autism, although it is an interest research lead.
Not quite. Oxytocin has potentially beneficial effects that are causing us to work further on assessing its value. There is enough info to suggest it plays a role in helping people "bond"/relate & also in decreasing anxiety. I've just begun using it with specific fda authorization in our autistic patients. We'll have more info soon. Limitations include short half-life & the overly dilute nasal spray.