[tyw]

regarding #1, I don't believe he's talking about someone who has chained together a bunch of jobs spending a year at each. Having "The same year of experience X times over" generally means you didn't grow as a developer from your experience because you were doing the same thing in the same way for a long time.

For example, if your job is cranking out CRUD apps or "online brochure" websites for various clients and you do it for 5 years, there's a good chance that while you're very good at those things now, it hasn't really gained you the same experience as if you'd been doing something a bit more demanding.