Hi spunkymonkies--don't have any second thoughts about holding your son back if you want to. You will find that that has become so popular, even when there have been no issues with prematurity or learning. It's especially popular for boys. I agree, it sounds like he's made great progress!
Tiff, it was fun meeting you & seeing the bambini in person! The 9 kids had such a great time together.
Bec, I hope the scan goes well and that you can simply enjoy having another look at your beautiful baby.
I love hearing about all the clockers & crawlers.