It absolutely does. I'd argue that the most important part of those exams is actually figuring out good pacing. Almost everybody performs better when they aren't racing the clock. Although you should review your tests and learn from them, NBMEs are not really learning tools. They're more of a gauge to see where you are. If you're gonna do anything untimed, do untimed UWorld blocks. Save the NBMEs for test-like conditions. They're much more useful and predictive then.