See, the comment came from someone at NoE. NoA, after that, responded with the following
"Games and services offered by Nintendo can vary by region. Nintendo of America will release additional information about Nintendo eShop, including timing, content and pricing, at a later date." - Nintendo's Charlie Scibetta
They wouldn't go out of their way to say that unless they were thinking the service may not be available at launch in America. More like, probably not. Sure will in Europe, though!
Like I said in the other thread, I can't absolutely guarantee that it'll be available at launch because Nintendo is still working on the interface as we speak. However, my intel is directly from Nintendo of AMERICA and they're saying that it's going to be available at launch, after a system update, just like the DSi's shop channel was. So if nothing else, they plan to have it available for launch, although it is possible that they might not make it.
Either way, it's better doing it this way than delaying the hardware.