Racing T was from the era when Campy didn't include triples in their groups. For example, in the 8 sp Ergo era there wasn't any such thing as Record or Chorus triples. If you wanted a triple, you got a Racing T. The reason being that triples weren't considered serious road kit. Then marketing changed and Campy included a triple in all their groupsets. When Campy redesigned their groups a year ago they dropped triples in all the groups and went back to separate triple groups again. Go figure.
Tim
that's interesting. does this mean that the racing-t, despite the name, wasn't considered by campy to be a "performance" group? is it more of a street/leisure group?