I just climbed on the scale, and while I haven't lost much in Hawaii thanks to brie and beer, neither of which I should be consuming, Thea has exploded. She now weighs 14 pounds, according to my scale, at 2 months of age, and is around 25 inches long, though that's tricky to measure. So she gained a pound a week while we were gone.
In comparison, Liam was 13.25 pounds at 6 weeks, 16 pounds at 3 months and 26 inches long at 6 weeks, so the two are running neck and neck, despite Thea's early low birth weight, which makes me believe even more that she was really losing weight in the womb prior to birth.
Healthy babies are the best.