The browns are jumbo as well, just not quite as jumbo as the goldens, lol. They weren't too far off from the goldens, but they are definately smaller. Maybe they will catch up by the time they hit maturity, but I'm not holding my breath on that. The goldens hatched much larger than the browns.
Yes, they were all from Byrdj. Just remember that two golden genes are fatal. So, if you breed golden to golden, you'll loose 25% of your eggs simply due to the double golden gene, so you'll still loose whatever else you'll loose for whatever other reasons.