It may be different on different realms. We decided to form a Dungeon Leveling guild, and as far as I know, even with our strong focus on running dungeons at-level, we are the largest leveling guild on Faerlina.
I’ve been max-level on this character now for almost a month, but prior to that, I leveled almost solely through dungeons, from RFC to OHB, and for the most part was able to form dungeon groups (being a paladin, and flexible in my role most likely helped some).
Anyway, I like that there are dungeon boosts, even though I mostly choose not to participate in them, and I’d prefer being the change rather than clobbering other people’s fun for whatever my idea of how they should play is.
I’m a little disappointed with some of the changes they’ve made for SoM, as it seems to push people towards questing (which I’m personally not a fan of), and away from grouping together to run Dungeons (which I personally like). But, we’ll see how it goes.