Will communicates very well. I can tell when he is happy, tired, sad, amused, playful or angry. Does he need some help with speech? Of course he does, and that is not surprising, considering everything about his life. It's not unusual to see children, even older than Will, from so called "perfect" backgrounds need extra help with speech problems. It's part of being human. We all have challenges.
I watched Real Housewives of Orange County last night (don't judge me!), and an adorable little perfectly healthy boy of 4 was also not potty trained. He was actually telling his parents that he needed a new diaper! His speech wasn't great either, but he was a cutie. Not every child does things at the same age, in perfect form. Throw in extra challenges and some delays can be expected.
My own son was close to 3 years and 6 months before I considered him trained! I was a mom who believe I did every thing to the best of my ability too. I think he was so laid back and content, that he wasn't really bothered by a diaper. He still has that calm demeanor. I guess he turned out fine. He was accepted in to the gifted program in 3rd grade, meaning he had to have an I.Q. over 135. He graduated law school 4 years ago, and he is one of the youngest attorneys in the state holding his position. He married a girl from law school who jokes that her parents thought she was "slow" because she could barely speak at 4 years old. She runs a company today. Along the way, both volunteered with Big Brothers/Sisters, adopted the most abused rescue animals, and still help at shelters.
I'm not bragging about my kids (ok, just a little), but want to point out that making assumptions about children and their progress, without much knowledge can be wrong. Besides, it could start a trend of bullying the little tykes, and that would be cruel.