Raphael was last weighed at his 2-week checkup and was 9 pounds 12 ounces. Yep, he'd gained more than a POUND over his birth weight (I don't even know what he got down to, since they didn't weigh him at discharge).
By now, he probably weighs at least 11 pounds, and he's only 4 weeks old. DS1 gained a pound a week for the first six weeks (and started with almost the same stats; 3.7 ounces lighter and 1/2" shorter, born about a week earlier), so I'm not shocked.