you know I wish somebody told me about this when I was preparing for step 1.
As for my story, even though I got a 250, I was unhappy because I knew alot of minute details, knew pharm and micro really well and path too - but I absolutely had no sense of physical exam, symptamology etc. Guess what - my step 1 looked very step 2ish to me atleast (many people disagree with me on this; this is my experience though). I really was going for a 260+ but I believe some clinical knowledge would have given me those 10 extra points.
As proof, my shelf exam grades, except psych, have all been near 99 percentile. So clinical knowledge is where its at. I've said this some other threads too, but I feel like schools like Baylor and Duke where there are clinical rotations before you take step 1 is a huge advantage IMHO.