I'm just going from memory and trying to remember which countries I missed last time. I'm not looking at any maps, and I'm making sure to only take the test once a day so all the countries I've forgotten about don't become too fresh in my mind.
It's beats or equals, so it's always going to be 100%. If you want to know how many people got less than 196, you'll need to get 195/196, and you're going to have to do that yourself.
No, I don't know a lot of country capitals. I'd be surprised if i could name more than half.
82 ~42%. Forgot some, but a majority I did not know and did not even look remotely familiar. Got most of Europe and South America, some of Asia and North America, and a few in Africa and Oceania (basically just Australia and New Zealand, both of which I tried several major cities before finding the right one. I can name all of the capital cities in Australia and my first choice for the capital of Australia will still be Sydney if it weren't for the fact that I knew Melbourne used to be the capital. Heck, most Australian AGers are probably from Sydney, Melbourne, Brisbane, and Adelaide. Is there anyone from Canberra?)