I just took my DS in for his 3yo exam.
The Dr. asked me if he could run, if he knew his shapes & could name a few colors.
In my mind...Well I'm pretty sure he can read RED and BLUE but I think TURQUISE might snag him. hehe

I never looked at the regular milestone charts but I am pretty sure 99% of 3yo can name colors and shapes even without instruction. Right?
I think that ruf's levels of giftedness are a slightly better gauge. Looking back, it is accurate for my DD7.