No worries.Woops goofy! I meant to say that if the child had a full time aide they were probably significantly delayed. Going back to edit that one now.

Although, not to beat up on you, but having a full time aide also does not necessarily indicate cognitive ability. I am only adding this because one of the frustrations of parents of children with Down syndrome is that so many advances have been made in recent years, yet the textbooks, the professors and even the medical community haven't always kept up. Our local Down syndrome organization often goes out and lectures in the medical schools to help new docs know the latest and greatest. We tell new parents to not pick up a book or an article that is more than 5 - 10 years old because it will be completely out of date.
My daughter is one of the lucky ones who has a mild cognitive delay. However, she always had an aide with her due to having to modify the curriculum in her inclusive classes. In her younger years, she had a full time aide and later in middle and high school, just a few hours a week. Also, due to the low tone inherent with Down syndrome, an aide was provided to help with the writing and to carry out the PT and OT's instructions.