Doesn't that obviously mean that he's not a fresh grad or has a part time job somewhere?
Not exactly. I hardly discuss the expected salary with the interviewer on 1st round interview. In my case, I would wait till the interviewer initiate the discussion about it first.

Sometimes they did not talk about it because they felt the expected salary is justifiable or it could be - they are interested in getting to know you rather than the pay which is could be negotiable (depending on individuals).

Vary case by case & individual. There are also people who would demand to talk about pay first before getting into the details.

siberfriend>> well we're not you nor the interviewer, so can't tell whether you stand a chance or not. Processing the documents take time and there may be several other potential candidates that they have yet to interview after you. Give and take another week. Or, you can always drop them another mail to check the status of your application.