Doesn't it also depend whether you bill by the hour or by the day/week? There was a discussion on freelancing a year or two back on HN where it came out that a

Doesn't it also depend whether you bill by the hour or by the day/week? There was a discussion on freelancing a year or two back on HN where it came out that at a certain level of experience, you're better off bidding by the week, e.g. $5K/week or $10K/week because clients often prefer to think in terms of total project costs rather than hourly contractor costs.