Aside from the fact that 2GB isn’t one of the more “demo friendly” stations, I think the main reason they often don’t get much discussion around rating survey release time (except when significant, newsworthy milestones are reached) is because they’ve been a fairly consistent #1 for about 13 years now.
As for 2CH, I think that station has usually hovered around 3% for quite some time now and has gradually been becoming irrelevant in the Sydney market (not quite at 2SM levels mind you, but probably still a “Wow, they’re still on the air?!” station) ever since Smooth 95.3 came on the scene.
Smooth 95.3 outrates 2CH in every demographic except 65+, there’s been at least three attempts at relaunching the station in the last few years, they rarely advertise…need I go on?
People ignore 2GB for ideological reasons. And it’s not “not much discussion”. People completely ignore the #1 station in their so-called summary - and it happens over and over here and in print. People don’t ignore Channel 7 Perth when talking about TV ratings because they always win.