My teachers tell us it's ridiculously difficult, but I really don't think it's that hard. :/ But I guess we'll see when I get my marks back.
My TOK presentation was a 20/20. We spent a loooong time on it, but only because we really enjoyed the discussion and the topic. I know others who didn't spend very long on it and got 20/20 as well. So that means I only need ~30/40 on the essay to get an A in TOK. I wrote the first draft of my TOK essay at 3 am. It was total crap, and I got 26/40... I couldn't believe it. I proofread it (didn't change concepts, just reworded it to make it more clear), and got 37 or 38, I can't remember which. :/ It's not like I was the only person with that mark, either - a ton of people in my class got 35+. A friend of mine is predicted 60/60 in TOK. But I don't know, maybe my school is just good at doing TOK.
The EE, on the other hand, I think is pretty tough to do well on. I spent probably 300+ hours on it, and got 30/36 (History), just baaaarely scraping an A (and expect to be marked down to a B). My entire class did their EEs in History, and only 1 other person got a predicted A on theirs. :/ Whereas on the History IA (which is done the exact same way with my teacher, just shorter), probably 10+ people got marked in the 7 range.
But at the end of the day, even an A/B gets you 3 bonus points. To be completely honest, I'll be surprised if I get 2.