What I've gathered from this thread is that Artemis were prefered at one time because of the superspeeds questionable quality. It is now believed that the superspeeds are a quality product at this time. While I'd prefer superspeeds it seems as if the Artemis are a fine substitute when properly installed.
Also a local room just had their rails completely refurbished and did not install superspeeds. My feeling is for the exact reason you mentioned.
What tables are in the local room you speak of?