My son started walking at 9 mths and saying most basic words around the same time. He seemed to be one of those babies that grew way to quickly. He is 8 years old now.
Our 2nd child didn't start walking until the eve of her 1st birthday, and didn't say anything understandable until about 18 mths old, then she just spat out a whole sentence (I want dinner!!!).
Our 3rd is 19 weeks, so it'll be interesting to see when she starts.
Mel, mum of Joshua 8, Maddison 5, Hailey 5 mths