I have to agree 100% with amwatts, on what he is saying. Majority of the questions, had 2 really really great answers. I was right 50% of the time. The very first time I took the first exam, I got a 4 on it, & I couldn't finish the exam in 1 sitting. I started practicing everyday - it's the first thing I do in the mornings. I wake up, shave, brush my teeth, & start a whole EK exam for 85 minutes.
After the first few sessions, I realized that reading in my head helped me a lot and as well as underlining important information in the passage. My grade went up gradually from 4 to 8, still not the best - but an improvement for me. Today, I took an AAMC test, and unfortunately got a 5 on it. The AAMC passages, are just another league of passages, imo. Just as amwatts stated, use EK only for practice, and use it with a grain of salt.
Btw, there is a really good passage in the EK 101 test booklet, on how to improve reading skills. It's in exam 9, just can't remember which passage. Towards the middle if I remember correctly. Good luck.