you know, i've heard this sentiment echoed by a thousand different people, and so far, i don't get it. now, i've only started world yesterday and done about 100 questions, but i already been asked about several head-scratchingly obscure facrtoids (say, the association between vitamin A and measles.)
i've gone through 70% of qbank, and maybe it's too soon for me to pass any judgement on usmleworld, but it doesn't seem to be the dramatic breath-of-fresh-air everyone is making it out to be.