If you want specific stats, psychohist has a good stats post. To sum up, Margaret is slightly below average in height, way below average in weight, and has a big head. The doctor sounded like if her weight continues to fall percentile-wise he might be concerned, on the other hand he did say, "looking at you I wouldn't expect her to be heavy."
The doctor did remark on her rather surprising strength. I forgot the exact words, something about being the strongest baby he's seen. Yeah, tell me about it. I knew she was strong a year ago. She is a lean, mean, crawling machine.