well, i really feel that i did worse than expected because i prepared a bit poorly. i didn't do enough questions, and i didn't pay enouugh attention when i did them. i used them more as a gauge than a study prep. so, what happened was that i was not as familiar with the wording, why some of the distractors were right or wrong, etc...so, just based on knowledge i was able to answer many, but also get a lot down to the best two possible. now, eliminating that last distractor is the value of the practice questions, IMHO. so, i think i had a lot of 50/50 shots that simply didn't go my way.
as far as the small subjects are concerned...a missed point is a missed point. so, any weakness you have can bite you in the butt. had i simply scored at the borderline performance in biochem, i think i could count on another5-10 points...that would have put me at or over 200, which would have made me much happier.
so, the small subjects likely will not overwhelm you. but, you want to be able to answer most of them right...if you get 30 biochem questions, getting 10 right instead of 20 can make a significant difference.
anyhow, you are prob on your way to the test center now! crush it, and try not to think about it after. just relax, and enjoy not having to study for that beast anymore!