That doesn't show that there was too much hype. That just shows there is enough popularity for an inexperienced developer to find it on their radar.
If it was overly hyped, you'd find a lot of experienced developers blogging about how they were horribly mislead and that node doesn't do what it advertises.
The FB engineer in his interview (http://news.ycombinator.com/item?id=3527419) says it just about right that "Technology is a great servant but a terrible master"!
Don't throw node and redis in the same bucket please.
A considerable percentage of HN's visitors deal in exactly the realm that node.js serves: that gooey layer between browser and back-end systems. This is like complaining that coffee enthusiasts are interested in burr grinders when it's entirely unsuitable for chipping tree branches. There is no surprise that many HNers find node.js interesting and exciting.
Likewise, another 10-20% is people converting working code from a perfectly suitable technology to Node.js because it's the new cool thing.
It's not that either of these cases is "wrong." They know their problems better than I do. But I've been doing web development for about 10 years, I've seen this cycle a few times, and I know that every new tech has ridiculous adherents that do that stuff (e.g., Rails went through the same cycle except for "productivity reasons"). Everything looks like an old and busted nail when you have a new and shiny hammer I guess.
I like Node a lot. I think it solves some hard problems, but just like NoSQL, TDD, and a bevy of other things, they're not silver bullets even if they're painted like one.