I think this is becoming a trend now.... thank god! I took exam few days ago and I found the test HARD.... like I was unsure of 25-30% Questions! I ascribed it to my sleeplessness , but few more have been saying that test is hard.
USMLE is marked according to the dustin-anghoff method or something, where the "probability of average student getting it right" is measured against your performance - so for harder questions, the number needed to get same three digit score will be less...... let us pray it is so.
best wishes to you.