I tend to disagree on this. Normally before I start interview the proper one. During those phone call screening, i will talk about salary range first. I will tell them what is my expectation and if it is within their range. I do not want to waste everyone's time going through the whole interview process only to know in the end that they can't pay what i want. Of course the final salary you will negotiate damn hard when they really want you. Salary negotiation is a real crucial skill.