Earlier quoted context omitted.
The cynic will say "karma whoring" but I think it's actually because it increases the likelihood that something will happen. For example, when there were coinbase issues, people wouldn't get responses for weeks. However, once a post about the delays hit the front page, the founders finally responded. So no, I'm not surprised this happened and I wouldn't be surprised to see a swift response
Do you seriously think upvotes on HN have any impact on Google's motivation to get Gmail back up?
The most I could see is some people from Google commenting here to give some slightly more technical than average canned response in order to flatter potential recruits. (And even that is so unlikely that I wouldn't assume any Google employees commenting here are doing that unless they gave the game away somehow.)