Isn't it? Usually distros target their packages to a single library version, and often people run suites (Gnome, KDE, etc) that use a similar set of libraries in their different processes.
I'd argue that libraries like GTK were only allowed to become so bloated because dynamic linking masked their true impact on the system. If static linking were the norm, we'd be using much simpler, cleaner libraries because people would think twice about adding 100+ megabytes to their binaries for basic GUIs.
