Who gets credit?

Knop discusses Sean's speculations about who in cosmology might get a Nobel prize. He quickly veers off into a stream-of-consciousness-like rant about collaborations which is well worth the read for the up and coming physicists.

Someone has to tell young, pospective physics how much social dynamics comes into play...or maybe I was the only one so stupidly naive about such matters.

Physics takes all kinds, and that means there are obstinate people who are slow to publish, and who don't take much care spreading credit where credit is deserved. To be clear, there are plenty of jerks who purposefully steal credit, but I'm assuming all know to avoid those people (unless you are one of those people!). But even well intentioned people who respect this process can simply have different priorities.