My daughter didn't crawl until 9 months, but walked at 11 months, but was speaking in full sentences by 18 months (so, she still walked a little early, but still had very advanced verbal skills) I don't know how true it is, but my daughter has always been very verbal as well. She used a fork and spoon by 15 months old though, so I think some kids just have it and some need more work at it. My son is 11 months old and took his first steps at 8 1/2 months, so he has been walking well now for 2 months already. We used baby sign language with my daughter and she could sign back at 7 months old....my son will only do one sign and even then, it isn't consistent. Girls, in general, are more verbal than boys, but every kid is so different, so you just never know. Your granddaughter sounds a bit like my daughter. She knew her letters by sight at 17 months old (capitals) along with her colors and numbers up to 10. She just turned 3 and now she is reading 3 letter words and writing her name. She can also add and subtract numbers up to 5. I think since she was the first child, she had an advantage because I had a ton of time to spend just playing with her all day long. I don't have as much time now, so my son plays a lot better by himself, but he won't even sit still to read a book! Their personalities are just polar opposites. He is on the go and doesn't care to sit and ask questions or learn about things. He just wants to run off and find something else to bang or throw...he is a boy after all. Enjoy your granddaughter for the individual that she is. She, and any other kids, will do things in their own time and it doesn't make them any less incredible! :-)