From personal experience:
I was a 5'6 165lbs white "kid" [23 at my peak] who had a notoriously bad start and strong finishing ability in the 100m. My standing vert was always weaker when making an overall comparison to something like my run and jump max vert (which was usually anywhere from six to eight inches higher than my standing one), and people often thought my 400m potential was my strength.
In the end? I ran a super windy 100m of 10.27 and a 10.31 INTO a headwind, whereas I could only muster a strongly wind aided 20.82 over 200 meters that same year (21.1x wind legals). AND my training was heavily skewed more towards a 200 and maybe even the 400 than the 100.
I was way better over 100 meters than 200, and I was even an awful starter. I couldn't have been THAT much of an anomaly . I think Bolings skill set can equate to as much potential over 100 than 200, and the fact that he's WHITE has no real bearing on the matter. If he ends up a better 200 guy than a 100 guy, the culprit would more likely be his skill set (how explosive is he/can he be?) than his racial make up.
And before you try to explain that white guys just can't be explosive, then always remember rebuttals like Combest (who is waaaaay overhyped by the way) or even the already aforementioned someone Kilty.
Personally, when I was running my 10.3s I was ROUTINELY getting my doors blown off by another white guy on my team through the 50/60 meter mark, but then I would still beat him by .30 over 100 meters because he was basically a mini-Christian Coleman and my finishing ability was probably world class level at the time. If you had taken his starting ability and my finishing ability, that likely would have made up an elite level sprinter, and later on in life I, myself, even developed a 35"/36" standing vert. So. A white guy could attain a 100m dash specific skill set if he had the kind of talents that I had, and I wasn't even really that good. If I didn't have the genetic lottery jackpot, you'd have to like the chances of a white dude like me who had. Face it, a lot of whiteys or even NON whiteys (Latinos, Asian Americans, Native Americans) are just not being exposed to or exploring their speed abilities. There are some folks in those populations who would probably succeed. And a PORTION of THAT portion would probably be better over 100 meters than 200 meters just on account of skill set deviations.
Also. For further example:
Devin Quinn, Whatley. Didn't he run a 10.01 at NCAAs? There. There's a white dude who has run fairly well over 100, but isn't really a 200 guy. What's his 200 PR, something like 20.30 or 20.40? He's definitely better over 100 than 200. And that's just in the last YEAR. Doubtful that he's some impossible anomaly, himself.