There is something slightly different about my son but that's it. I did get he is so clever type comments but I expected clever. He was very persistent though and advanced if you did stuff like block stacking, shape marching. Late to roll, average for crawling, sitting and walking. IQ 158. Ds4 was early to sit, roll and crawl but pretty average for walking. Has no persistence, more socially adept (aka manipulative). Unofficial assessment >99 percentile. Formal testing next year.

I don't think RUF or milestones are very accurate.