Since burnout is primarily developed in the mind, due to many factors I don't think there's a specific "developer burnout". Burnout however can be very real. What I have seen there are not enough real quality studies on the topic. In my opinion, and it's just my opinion, it is caused by the psyche pressuring the body to unhealthy levels over a certain time period and afterwards trying to recover from the damages that have been done.
This goes for every field. Sitting for hours, days and weeks in front of a computer and trying to meet a deadline is just one example. :)