Oh yes. I hate grammatical, spelling, punctuation, and capitalization errors...especially when they're made by me. I also hate abbreviations on forums and I make them as infrequent as possible. This is also why I hate IM, although I'm more laid back about it now than I used to be.
It might be a xxTJ combination.
In theory, though, this could be rooted in an S function. NTs tend to be the worst at nitpicking, because of their need for logic. But since they also have a less developed S function, they will probably more likely use it in an unproductive manner -- such as nitpicking. Because I don't see many Sensors having problems with nitpicking.
Also, I think an underdeveloped S function is also the root of many NTs' desires to collect useless knowledge, such as statistics -- a lot of NTs are good at memorizing these kinds of facts, including myself.