No, because it's silly to assume we function at the same level in everything. Maybe NTs do, but not us. At school, I'm every bit as good as the average neurotypical engineering student (yeah, that might be an oxymoron, but let's leave that for the moment!). On the other hand, what most twelve year olds can do easily by way of chores around the house I didn't learn til I was past twenty; and some organization skills that most teenagers find easy are still beyond me. Emotionally, I have a great deal of insight but very little control, so that I function like a six-year-old who somehow knows a great deal about cognitive and emotional psychology, and can only use preventative strategies to deal with problems rather than trying to control myself when it's needed. I learned to drive ten years later than most, and am just learning to run smoothly (the prospect of actually going running is new to me, and I think I will rather like it once I don't fall down constantly!). Socially... wow, I think there are probably toddlers who are more savvy than me in some areas. I definitely don't get much past the ten year olds in that area. On the other hand, in my special interests, I easily match graduate students despite no formal training, or if the special interest isn't academic, match the top percent or so. You can't put age equivalents on those things because most adults don't manage them.
I'm 26 years old, and by your schedule I should be functioning at the age of about 17. I'm way below that in some areas, way above it in other areas, just about on schedule with the driving. Some places I'm actually at the same level as most people my age--I can deal with paperwork about as well as most 26 year olds, for example.
So. bottom line, I think it's silly to assign a single age-equivalent to an autistic person. There's very few (perhaps none) that actually have most or all skills at any single age-equivalent at all, either delayed or advanced. That's just the nature of autism.