Yes, each section of wall will constitute a group. Each wall (group) will then have a number of attributes (library) assigned to it. One of these attributes is the "wall grouping" which will allow the user to group similar walls together. The intent with this attribute is to allow the user to modify all wall segments within a grouping when they modify just one wall segment (ie. change wall height, stud spacing etc...).
Within each wall segment group will be the window and door groups, these will be composed of the header, trimmers, kings and cripples. When you delete a door or window the wall segment group is redrawn and the regular studs are replaced to fill the spaced previously occupied by the opening.