What everyone has to understand is that Norton and Symantec Endpoint Protection are absolutely nothing alike. The only common attribute is they are both developed by Symantec.
They use completely different scan engines and virus definitions.
Endpoint Protection (or Corporate) is not Norton at all. But you are correct about the latter. Several large corporations use it and love it because of it's fast scan engine, low profile and ability to setup central definition and network scan servers. But it's just that: corporate.
Most basic users don't like using it because it's so low key (almost no notifications unless specified otherwise) and isn't as "average computer user" friendly as many others. I personally like these attributes so I use it.