At what point?
Well, the term "Hybrid" means nothing more or less than the use of steel AND wood in the construction.
Until now, this has been done as follows:
1. Steel supports with a wooden track system (ultimate example: The Voyage, Holiday World).
2. Wooden supports with a steel track system (ultimate example: The New Texas Giant, Six Flags over Texas).
The Outlaw is actually kind of a third in this row, because is has steel ties, steel rails but with an extra layer of wood between them. However, the actual rail (which is made out of one piece!) and the ties are truly built of steel.
Therefore, I am convinced it should be known as a Hybrid Coaster (Wooden Supports).
Niek.