LOL. I agree! I have two cats and their behavior is many times more mature than that of the typical person I encounter.
I guess my controversial opinion is that I really don't like cats. I was much more offended by the suggestion that cats are smarter than humans than by the the suggestion that we were incompetent pack animals.
Also, on the subject of never having heard "Stairway to Heaven," I played a game in which I had to get my brother to say Stairway to Heaven without being allowed to use words. I'd only heard snippets of it, and I'm a terrible singer, but I tried to hum it for him. He was completely at a loss, so I was sure I must have the wrong tune.
The next day, I suddenly remembered what tune I was mistakenly humming. It was "Highway to Hell" by AC/DC, which I had heard repeatedly many years ago while I was in college.
Oops. I guess you can't be much further off than that.