No, what I did was export the few categories that I had, then added new ones to be sub-categories of them--left off the category ID since I wanted these to be added, made sure column D was FALSE (tried it as TRUE also). All of the new subcategories became new primary categories. Guess there is no way to add them like that--I just went back and added them one at a time from the admin site.
After I added them, then exported, I was able to configure them on the spreadsheet in bulk, then uploaded and they worked great. Saved me lots of time!
