HN has its fashionable topics. Interview bashing is popular at the moment. It's also a suggestion to me that maybe there are more people looking for work right now. That's not a particularly good sign. Either the benefits to job swapping are too great to ignore, or there are too many failed startups, and companies failing to retain their staff.

Edit: Or it could be that "school's out for summer", and there are a fresh new batch of grads, masters grads and PhD's on the market.