I don´t think there is a right or wrong in this subject.

If you think a test cd with pink noise works better than the internal test, you should use it.

It´s the enviroment in your livingroom that has to be compensated with the test, not the speakers.

And there is´nt any livingroom that look or "sounds" the same.

A test that work perfect for mr.X does´nt necessery work for mr.Y

It´s all comes down to your ears.
After all, you bought the stuff it´s you that should be satisfied with the soundstage.

/Jocke