To all of you - THANK YOU!

It is so great to hear of others in the same boat, and the validation that jsut b/c little man isn't behaving similarly to big man doesn't necessarily mean... well, anything!

I think i will continue to fret (it's in my nature?) but maybe only a little.

It is VERY comforting to hear from those of you who have older kids and have been through it - and from those of you who are going through the exact same... waiting... ! And, thanks for the articles too!
I guess that since neither my husband or I have had any issues with learning disabilities, that has never crossed my mind. (though i should know better than to assume, little man has also been riddled with all sorts of food allergies, eczema, etc. which none of us, including big man, have had to deal with - or certainly not at a young age...). I should keep my eyes open, just in case....
I think i get the main msg. from everyone though...

"CHILL! And ENJOY the ride!". Yes, the kids are a trip. And they grow so fast! Thanks for the SO warm welcome. I will plan on waiting and watching, and yes, probably do some testing down the road. And as Kriston says... I've found a GREAT place to hang out while i wait!
Again, to all of you, THANK YOU. I can't say that enough.