Blogging, especially for a personal blog like mine, is a very different kind of writing than the sort one does for a book, a journal article, or a general audience magazine (whether print or online). Blog posts are typically written in an ad hoc way. They are often commentaries on the controversy du jour, direct replies to an article or blog post that recently appeared at some other site, responses to reader comments or questions, or reflections spawned by what the blogger happens to have been reading or thinking about lately. The style of a blog post is informal and more intimate than that of a book or article, and more likely to reflect the author “with his hair down” than those other sorts of writing typically do. It also reflects the interests, background knowledge, and attitudes of the blog’s regular readership. The author knows that he can address certain issues, casually refer to certain other writers or ideas, and make certain jokes or offhand political remarks that would not be appropriate in other kinds of writing, because most of his readers, including the ones who don’t necessarily agree with him, already know “where’s he’s coming from.”
The tone and content of a particular blog post are inevitably going to reflect the circumstances under which it was written. If a blogger is replying to something a reasonable and polite critic has said, the tone is likelier to be gentlemanly. If he is replying instead to a nasty and unreasonable person, the tone is likelier to be hard-edged. If he is commenting on a matter of academic controversy, there might be a casual use of technical terminology or references to writers and ideas with which the average reader will be unfamiliar, whereas on more general topics a blog post might be more accessible to the non-specialist. But in most cases, a blog post is simply not going to be written the way an article for a general audience would be, especially if the writer happens to be an academic.