Our baby was close to 10 lbs at birth so I wasnt suprised at the news at our 9 month checkup....she is 23 lbs and 29 inches long...she also has 6 teeth!!
Doc said she is very proportional but will be a tall girl!
Our doc said the same thing about DS. At his 9m apt he was the same as your LO. 23lbs and 29 inches. He said it puts him at 6'2" full grown. DH is 5'9" and I am 5'3" so he obviously didn't get that from us...my brothers are very tall though.
Another "big" baby here. 9 lbs 2 oz at birth. 20 lbs 4 oz and 29 inches at her 9 month appointment. I can't wait for her 12 month to see how much she has grown.
ETA: 8 teeth with 1 year molars coming soon. (Hopefully very soon.)