Same. Neither of my kids made eye contact as babies. Ever. They preferred to look over my shoulder at the high contrast picture frames. They didn't babble or coo or play peek a boo or patty cake. I knew before they were each 12 months old that something was off.
However, my oldest did the same thing as PPs son and stopped talking at 2. Just up and stopped. Started grunting and whining instead. Started talking again around 3. It's a common thing with autism and it happens around. 18-24 months. 24 months is also when my son stopped eating EVERYTHING he used to. It's a developmental key age and it just so happens to correspond to the vaccine schedule so a lot of parents blame the vaccines for the manifestations of autistic behaviors at that time, whereas it would have happened with or without the vaccines. It's easier to blame vaccines than accept reality.
And not to harp on it, but kids don't "outgrow" an autistm diagnosis. They were either misdiagnosed to begin with or they have learned enough coping mechanisms or been "ABAed to death" long enough to fool people. My dad was one of these. At age 33, he had a full and complete psychotic break from years of trying to stifle his behaviors and emotional responses. Ended up in a psych ward while on vacation in Germany with my mom. Diagnosed with bipolar. As a kid, then a teen, then a college student, he was brilliant, well liked, successful. Graduated near the top of his class at Notre Dame, then graduate school. He was an engineer. He had a lot of accomplishments in life. He didn't realize he was autistic until MY son was diagnosed, and he started reading about it. He was 63 years old. The diagnosis didn't exist when he was a child in 1950. Neither did the MMR vaccine.