I agree that it is inpolite to not read a resume or a cover letter. But as a candidate, you can't change the fact that your interviewer is not well prepared. The job will go to the candidate that makes the best of the situation.

The bigger point I'm trying to get at is the following: do not expect the interviewer to discover how brilliant you are on their own. Being smart, hard working, is not enough -- you also need to tell people about it.