Not exactly, but close. Remember this is all based on probability - we all dreaded getting a form that randomly hit all our weaknesses, so I think we intuitively get that there are fluctuations. For most, the law of averages will ensure they score pretty darn close to their pre test scores assuming they were done under testlike conditions.
I think the message is not to obsess about small differences in scores. You’ll see posts where someone drops from a 245 to a 235 and wonders what went wrong - may just be random chance. The better scenario is the opposite - jumping 10 points and taking that to mean your prep is effective. Could also mean you’re maintaining and hitting a plateau. All has to be taken in context with your own comfort and facility with the material.
In the end, step 1 was designed as a test of minimum competence and not as a means to distinguish applicants. It’s sad that it’s used this way and perhaps one day to usmle will respond by changing the exam to allow more fine distinctions between applicants.