Kind of depends on the company, and how many positions they are trying to fill. Personally, I don't wait, just keep looking. Never been real picky about jobs, just take what I can get. Any paycheck, is better than looking for a job, and can still keep looking if it turns out to be a bad job. I give them a week, if I really like the place, Id go back and ask if they are still hiring. Sometimes the job you wanted gets filled by somebody's brother-in-law, but they have other positions available.