For some reason this is a common thing Audies seem to think ... the only reason I can come up with is that they are working under the mis-conception that being SSD is actually more like being hearing than it is like being deaf (not at all the case!). The Audie's and "professionals" try to "picture" what it would be like and come to the conclusion that it won't really make a difference ... however if you can find an Audie with SSD with a BAHA (they do exist) they'll tell you a VERY different reality.
One way to look at it is - SSD is a lot like having ONE CI ... YES you are able to hear A LOT better (typically) than with hearing aids ... however anyone who goes from 1 CI to two will tell you that it makes a HUGE difference in being able to understand sounds, localise, understand in background etc ... which is why so many people are going bilateral 
For what it's worth - most of the SSD children I know (IRL, online etc) who've been fitted with the BAHA headband actually like it - because they can hear a difference with it on (HAs don't work nearly as well for SSD, even though it's what I use)
To understand a bit more about with SSD is like - there's a webpage that I often send to people that is sort of a "day in the life" of someone with SSD - Single Sided Deafness page
One thing that may be worth asking Adams Audie to "look out for" is the possibility that he's got SSD as well as APD ... this is diagnosed over time by observation - there is no "test" espeically for those with hearing loss, and especially those with SSD.
I'm very excited that Adam will have the benefit of growing up with ASL ... it is one of the things that I constantly wish I'd been able to experience - it would have made communication, education and LIFE so much easier.
