He's really changed. There is a subreddit /r/linusrants that documents his rants. In the last year there have been 9 posts, but most of those are reposts from previous years or not really rants or aimed at technologies, not people. Three years ago there were 27 posts.
And what makes this even more impressive is that he managed to do it despite being - in manys eyes - a very nice and reasonable person to start with, it wasn't like everything was falling apart around him and everyone was leaving their jobs as maintainers AFAIK, he just decided it would be better for the project if he left this part of his personality behind.
