I have taken 5 random USMLEworld 50 question blocks and have gotten from 52% to 58%. Any idea where that leaves me?
That's a good start, but since you've only taken about 12% of world, it's really not possible to predict with any confidence where that leaves you. Study hard through the 6 weeks. Make sure you are reading the explanations of everything on world you get wrong, and take tests of the things you got wrong after you have done more problems (and not immediately after you have read the explanations). Work through all of world, read FA and other resources. Do the NBME practice tests at some point in your study plan. Make yourself strong in biochem, pharm, path, pathophys and micro. Make sure you are doing well at timing -- the world questions tend to be shorter than the actual exam questions, so if you are just finishing world, you are going to have a tight time in the test - which can cost you a few questions you are too rushed to read.
And make sure you take a break day or two during the process. After 6 weeks, you should be ready.
In my opinion, you don't do yourself a service trying to predict where you stand when you are 6 weeks out. You will learn new things, refresh things and even forget some things over the course of the next 6 weeks. And the experience and pressure of the real exam can't be duplicated and can affect your score significantly, making anything you take in the comfort of your home a tainted indicator. So, IMHO, you won't have a great handle on how you are doing until you actually take the test. You will generally know if you are scoring "well" in your study resources, or "poorly", but probably not be able to guestimate a realistic target score. Lots of people claim NBME tests are the best predictor you can find, but NBME itself says on their site that these tests are not meant as predictors of the real thing, and to some extent if you have used world or kaplan you will have already seen all of the NBME questions since those banks definitely will have incorporated all of the released former board questions. (The folks on here who claim the NBME was a perfect predictor of how they did are generally balanced out by at least as many who didn't see such predictive value). But I suppose for some, it is better than nothing.
Certainly if you are two weeks out from the test and scoring, eg <35% on world, NBME etc, you might want to try and push back the test. But beyond that it probably doesn't pay to focus on predictors. Focus on learning. Every question you get wrong in world is an opportunity to read the explanation and learn why. So if you get horrible scores in world the first time through, but in later blocks of questions are thereafter acing the things you got wrong previously, you might actually be better off than if you were scoring decently the first time through. Food for thought/debate.
