The problem with these articles is that they suggest that in order to be a brilliant savant (ie: can do difficult arithmetic mentally without a calculator, or can play chess at an expert level with minimal tutoring), one must be autistic. This is not the case. One may be autistic, and not brilliant, just as well someone could be a brilliant savant, but not be on the autism spectrum. The two cases are effectively statistically independent of each other.
Another issue is that autistic savants often get much more attention than their typical (ie: non-autistic) counterparts due to being able to carry out an apparently amazing mental feat despite suffering from a crippling set of mental limitations and/or deficiencies. Someone not suffering from such a condition is just generally thought of as very smart, and being an educated savant is not such a crowd pleaser, especially in an age where anti-intellectualism is on the rise. Everybody likes a hero story, but few people are comfortable accepting the notion that there are much smarter people out in the world.
If parents are lucky enough to have the funding to send their kids to private schools with a Behavioral Interventionist (BI), then the strengths of the child are usually discovered early on, and it can make the kid's life a lot easier. If the parents don't have the cash though, the kid likely won't enjoy that benefit.
On a side note, one should consider noticing talent amongst the non-autistic population in a school. How does one filter on this criteria when kids are not challenged? I turned out to be a math whiz in school, and was doing calculus by the time I was entering high school. If it weren't for my parents, I would've had to endure 5 years of boredom in high school math, as most of the teachers just came with a hangover, passed the daily readings out, and sat at their desks playing minesweeper. Thanks to my parents, I was allowed to fly ahead in math, and use my spare time for more shop and science courses. If the teachers don't care in the first place, the odds of them helping out their brightest students is minimal.
Background: Been debating this topic with a colleague who has 10 years experience in this field for years over lunch.