Drifter> sorry to hear that things are a little rough for you right now.
Two things:
1.) Good friends of mine went through a VERY similar situation - child wasn't really communicating, etc. and preliminary "findings" had the parents prepared for a full-blown autism diagnosis. As it turned out, the boy just needed a
little more time and now the kid won't shut up.

Not telling you that to get any hopes up (feels wrong to put it that way, but I think you know what I mean), but I would guess that this diagnosis isn't the end of this.
2.) Another good friend of mine has two autistic children, both of whom are at a fairly severe level. But -
every child has his/her eccentricities, and you will learn what he likes and - more importantly - how to talk to/reason with/scold/punish/love/cherish him.
We're here for you to vent, whiskey or not. Keep your chin up and use the strength the collective FFA will give you to support your wife and especially your son.