As long as the tutorial is engaging, I don't see a problem. The tutorial in K2 was not one I wanted to do more than once. The tutorial in Oblivion suffers from an extreme linearity: I couldn't actually kill the King, for example, even though I got a few good slashes in ...
The point is that if the tutorial does its job correctly, then people will learn about D&D 3.5, so that new and experienced D&D players alike can make an informed decision about characters and races, etc.
Yah! Unreal 3 engine on the PC!