Some of us were inclined to think that the cost-cutting measures taken to produced the G lenses were detrimental to quality. We have learned (slowly) that: 1) A G lens has no aperture ring. Since they are aimed at the N55, N65, N80 camera users, camers that can control the aperture through dials. No problem there and the cost of producing them is greatly reduced. 2) A D lens is one with a chip relaying distance info to the camera's CPU, only relevant for flash pictures; however: 2.a) The Nikon Flash systems been so amazing (close to magical), it makes little difference in the results whether you have a D lens or a non-D lens. 2.b) It seems now that G lenses also have some sort of D-type chip on them, they just forgot to tell us.
So, no; the G lens is not a less quality lens type, it is a less-costly-to-produce lens to ease new entrants into Nikon's world and as such they do not have the robust feeling of the oldies but goodies.