Call me a romantic, but I find the idea of a lone-gun blogger who is a paralegal by day, and an injustice fighter by night. Apple, Intel, Sony, Microsoft and Google are all big companies, but I suspect the number of paralegals they employ is far less than those employed by all the legal firms in the US. Who is paying PJ? I really think the most likely answer is 'nobody'. (After all, most blogs are run by nobodies :)
The quality of reporting in specialist fields always seems to be poor to terrible. I am a big fan of badscience.net, and all the great work it's owner does to identify poor medical journalism practices.
I think that groklaw is a bit better than most sources; as you say, IT-related stories in newspapers are appaling, but groklaw's coverage is better than them, at least. I also prefer silly, uninformed ranting to coverage that serious, informed, but just plain wrong.
I also didn't follow groklaw's coverage, except when linked to from one of my regular news sites. Perhaps some of the silliness was already filtered out for me. If it isn't too much trouble, I would like to see a link of a groklaw story you take objection to.