<p>montrose,
PhD students and postdocs are the same slave labor, just in a different situation. Sleepless nights running the experiments, months spent only to discover that your main idea( or your profs main idea) was worthless and you need to start from scratch again. I am not going to argue about strenuosness of MD training, I just resent the "PhDs have no right to call thenselves doctors" speech. :-)</p>