Can an autistic person have very advance language skills? Can an autistic person have very advanced language skills (Verbal communication, not about tonal nor body language skill, nor the written verbal language, I keep dyslexia out of this discussion for sake of specificity) and a very Early age of first talk, while having other autism symptoms?
Notably there are a few blogs and many social media posts that writes about &quot;hyperverbal autistics&quot; but I did not find scientific literature about hyperverbal autistic people.
They may be referring to hyperlexia (rather than hyperverbal ability):

Hyperlexic children are characterized by word-reading ability well
above what would be expected given their age. ... Some experts believe
that most children with hyperlexia, or perhaps even all of them, lie
on the autism spectrum.

But as far as verbal ability goes, since autism is a spectrum disorder, there is bound to be a spectrum of verbal abilities in those afflicted.  Wikipedia summarizes:

Language impairment is also common in children with autism, but it is
not necessary for the diagnosis. ... It is also common for individuals
with ASD to communicate strong interest in a specific topic, speaking
in lesson-like monologues about their passion instead of enabling
reciprocal communication with whomever they are speaking to.

In other words, &quot;hyperverbal&quot; autistics are hardly unusual.  However, they often struggle with perspective-taking, and hence may speak out of turn, failing to assess their audience's level of interest.
For recent reviews of language acquisition and verbal abilities in individuals with ASD, see for example:
Eigsti et al (2011); &quot;Language acquisition in autism spectrum disorders: A developmental review&quot;:

... early studies indicated that some 50% of affected individuals
never acquire functional speech, though more recent estimates find a
smaller proportion of non-verbal individuals, typically around 25%.
Language acquisition in ASD is characterized by dramatic delays, with
first words produced at age 38 months, on average, compared to 8–14
months in TD.

Volkers (2017); &quot;Untangling the Language Challenges of Autism&quot;:

... on average, children on the spectrum produce their first word one
to two years later than typically developing children. And we know
that language ability among children on the spectrum varies
greatly—some may be fluent conversationalists, while others can barely
speak.