I love using the abbreviations and acronyms! It saves time when repeating the same words (daughter, mother-in-law, etc.) that get used here so often. But no one "has to" use them, of course. There's a list at the top of the page one can click on if one needs help understanding them.
But, of course, it doesn't include everything. Rowantree, AC (or ac) = adult child or adult children, depending on context.
Rock, I agree with others that most of us raise our kids to be independent - not just dss, but dds, too. Unfortunately, some of that independence includes pulling away from us, which is often uncomfortable for us, but very normal, I think. Maybe it happens a little less with dds, but it does happen with them, too, or it should, imo.
Please be careful about judging a book by its cover. Just b/c some moms may seem closer to their dss than you are doesn't mean there isn't a lot of friction underneath. That gf may put an end to those shows if she becomes the ds' dw (dear wife). Who knows?
Should you "demand more" from your own ds? No, absolutely not! First, you really don't have the right, imo, to try to tell him how to live his life or organize his time. Secondly, it's likely to just cause a huge argument and could end up in your seeing him less. If you really would like to see him and your gc more often, I think you could let him know how you feel in a pleasant way. ("I'd love to see you and the kids more often. Is there any way we can work that out?" But if he says no, you'll have to accept it, imo.