Yes, they exist, but the commands aren't as general as they might be for some games. Most of our debug controls exist in the UI, but aren't really useful without the server being setup to accept those commands. An example of a console command: "viz" By itself it does nothing, but "viz gbuffer" or "viz luminance" or "viz wireframe" do do something. You can see examples of what those commands in my post in varrak's Graphics Update V1.2 thread here.
Some commands & examples - from ui/alpha/shared/js/console.js: profile - creates a performance profile? exit - quit PA help - no effect set # - unknown parameters viz # - accepted parameters: wireframe VTMips VTPage occluders albedo normal depth gbuffer bright luminance nobloom viz wireframe viz VTMips viz VTPage viz occluders <PA crashes> viz albedo viz normal viz depth viz gbuffer viz bright <no effect?> viz luminance (Needs HDR enabled) viz nobloom <no effect?>