No, they are "shotties" and we apparently have hundreds of threads where they are called "a shotty" and "shotties." So apparently they are...
I don't care for the term either, but it seems to be an accepted term.
As for the KSG for HD, I really like the bullpup aspect for a reduced length gun that would make it easier to use around corners. I have a Knoxx Spec Ops stock on my 870 that gives a nice short profile, but I think the KSG is shorter. The Knoxx is nice in that it can be reduced to being shorter than a typical youth stock and yet extended if you prefer. It also helps with felt recoil.