Typealyzer says that this blog appears to be of the Myer-Briggs type INTJ.
The analysis indicates that the author of http://blog.jackvinson.com is of the type:
INTJ - The Scientists
The long-range thinking and individualistic type. They are especially good at looking at almost anything and figuring out a way of improving it - often with a highly creative and imaginative touch. They are intellectually curious and daring, but might be physically hesitant to try new things.
The Scientists enjoy theoretical work that allows them to use their strong minds and bold creativity. Since they tend to be so abstract and theoretical in their communication they often have a problem communicating their visions to other people and need to learn patience and use concrete examples. Since they are extremely good at concentrating they often have no trouble working alone.
I assume you can point Typealyzer at just about any website. Google.com doesn't have enough text to analyze. I tried several blogs that I happened to have in local memory, and many fall in the INTJ bucket.
[found via David Snowden, who dislikes any kind of categorization, but it's the weekend]