i feel like HN is fascinated by but has relatively little understanding of how deals work. companies don't just show up on your doorstep with an acquisition offer and a giant check. many times the deals are staged and dependent on progress. consider google's acquisition of dMarc, the talked about price, and the actual price.
I think HN is much better than TechCrunch/Mashable/etc in that regard. The big tech blogs seem to have a vested interest in promoting the idea of huge acquisitions. People here seem genuinely interested in the details and the detailed outcomes.
There's not even a glimmer of doubt in anyone's mind that the reporting might be incorrect, etc.