I agree the Oregon Tort grows super slow and while I don't have (or have never seen in person) the "dragon" you are referring to, in general dragons are very fast growers when in proper conditions - especially new and thin branches. I have noticed most dragon frags grow really slow when on my frag rack (right below the surface, TONS of flow and light) but much, much faster on my rockwork about 1/2 way down and in shielded flow (so they get lots of movement, but no direct flow). The tips of the branches are generally super thin (like twig thin) but can grow an inch in just 2 or 3 weeks. However, the thicker base of the branches grow much slower. Try moving it around - most dragons don't like the insane light and flow most other acros do.