I feel it still sets a decent baseline for the purposes of discussion. We will never be able to accurately model every last developer's situation. Though entry

I feel it still sets a decent baseline for the purposes of discussion. We will never be able to accurately model every last developer's situation. Though entry-level developers are even more costly to employ. They require more training, more time to solve problems that are old-hat to experienced developers, etc. You still need to bill them out at, say, $100/hr. with the expectation that for every productive hour, they have an unproductive hour that isn't billable.