Something I've Noticed..

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1. Stereotypes are bad. Your anecdotal story doesn't apply for all go-getta's.

2. From what I can tell, that "99" in the score doesn't mean 99 percentile.
 
For example, my cousin, an international student, finished up medical school as a gold medalist and just got 99th% on the USMLE Step 1, yet he is probably the most annoying and obnoxious person I know.

Gold medalist? Huh??? Your story doesn't make a lot of sense because you typically take Step 1 in the middle of medical school, not after you finish up.

As for your larger point, I've known some real curve busters (1 B in all of HS and College types) that were quite socially adept and "normal". It takes all types. I can think of more of not-so-bright types that I'd rather not hang out with than I can eccentric bright people who turn me off. Maybe I enjoy the eccentricity a bit.
 
Gold medalist? Huh??? Your story doesn't make a lot of sense because you typically take Step 1 in the middle of medical school, not after you finish up.

The key phrase is "international medical student." Frequently, FMGs take Step 1 near the end of medical school or after graduating. Additionally, gold medalist are people at the top of the class.
 
Just clarifying:

he finished up med school already but he is an international student (med school completed in a different country) and has to take the USMLE now to practice in the US

he did score in the 99th percentile and he was a gold medalist in his med school
 
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