If I ever would be doing such a thing, it would be more of a lesson in how to use node.js properly (even for non-typical tasks like sorting) then a performance comparison between node.js and .Net. Even then, I don't think it would be very interesting for people who like to read about node.js. It would be non-news to them, and for an atypical use-case.

I actually have no interest at all in getting a .net stack running on my mac.

The misleading information is what bothers me, so I hope to see it corrected. It's especially harmful because his blog will be most likely read by people who naturally favor .net. It's not even a tech blog per se. Then objective information is all the more important. (EDIT: Actually it does seem to a tech blog, which surprises me a bit, given the superficiality of his analysis)

You can see at the end of his posts, how he diverts from the main subject and goes on about (I'm sure to be) wonderful technologies and possibilities that the .net stack offers.