Well as I suspected, this forum has led me down a path that leads to another path that leads to an intersection, which narrows to a on ramp that leads to a four way highway that has taken me to new ideas that only serve to confuse me and excite me with more choices about tubes.
It's hype, intended to make you want to purchase their product. Groove Tubes, Ruby Tubes, TAD tubes, whoop de freaking do. They will come from any manufacturer. (well, the TAD tubes are all Chinese, and I for one have had great success with Chinese tubes, my Heartbreaker from 1999 shipped with Chinese tubes...)
Just get matched power tubes, and have it your way with the preamp tubes. In fact, here is a link to a preamp tube sound comparison: