Being nonverbal if you're classic autistic is quite common. It's NOT universal (and there are a lot of high functioning autistic folks /Asperger's who can speak quite well) However, it's common enough that there's a HUGE therapy industry for autistic people who don't speak.
"a classic autistic". What exactly is a classic autistic? I was unaware I am an autistic? What is an autistic anyway? I don't think a determiner such as "a" can been added infront of the word autisic since there is no one autism. There are people who have autism, but last time I checked there weren't people who were an autistic, classic or not.
If you mean a person who has Kenner type (disintegrative) Autism, many of us who have this kind develop speech normally until we are a few years old and then as the inability to process sensory information gets worse a "regression" happens and we struggle to produce speech. There are many of us with Kenner type autism who can speak and speak well.
It is really frustrating me that you are such an "expert" on everything.