OK, here are some opinion things from his page that are pretty judgemental (only a few because it would take all day to look at every entry):

"Occasionally computer programs encourage you to write "AM" and "PM" without a space before them, but others will misread your data if you omit the space. The ugly habit of omitting the space is spreading rapidly, and should be discouraged." [AM/PM]

"Another example of the oral transformation of language by people who don't read much." [for all intensive purposes]

In particular he is inconsistent in his non-errors section, listing a bunch of things as "non-errors" or "now currently accepted usage" which don't seem very different from other changes he rails against in the other section. For example, what causes him to accept "momentarily" as a non-error, but says for "dove/dived" that "a few authorities consider "dived" preferable in formal writing". His statement on dove/dived is so vague that maybe it should be under the "non-errors" section. And the non-errors section is where I perceive most of the meanness:

"Pedants have labored to enforce..."
"Some people claim that..."
"Some people insist that..."

It IS a useful list but I have some problems with the presentation, that's all.