The problem is people may want this computer could be swayed away because of the misinformation calling it a netbook. When people hear netbook, they think small, underpowered computers.
How do you know what "people think?"
Here's a likely scenario:
Potential Customer: Hey, I need a small computer that I can use to surf the web, do email, access my office files and maybe even watch a movie I've downloaded. It needs to be small and light, but with a real keyboard on it...not one of those tablet thingies.
Apple Employee: Well have you looked at the new Macbook Air? It should meet all of your requirements.
Best Buy Employee: Well have you looked at any of our netbooks? Most should meet your requirements.
Its a branding difference to "most people" I'm guessing. They are going to be comparing the MBA to a whole host of netbooks. Smart customers may notice that the MBA has a far nicer build quality, runs OSX natively and in general just seems like a "premium" product. Average joe will likely decide with their wallet, particularly in today's economy.
But the point is that the 11" MBA is now Apple's "entry-level" computer, side by side with the plastic Macbook. People will compare the two and if their needs are simple, they'll likely snap up the 11" MBA before the plastic Macbook behemoth.
I don't think "people" will mind whatsoever that they are comparing a MBA to a netbook...they will, in fact, be doing so on a very regular basis from here on out.
I think owners of the MBA, particularly the 11" MBA, have a problem being lumped in with "most people" and want to be seen in a certain light. And thats the crux of this entire argument. It has nothing to do with the device itself...it has everything to do with your feelings. Calling a MBA a netbook hurts your feelings.
And if THAT is your REAL argument, then just say so. I've no desire to hurt your feelings in a callous manner. I'd be happy to refrain from doing so if I knew that was the real reason...which I highly suspect is now the case after reading these posts.