You think this nicca on the juice?
It's possible. A lot of people in this thread are going on about the delts being popped out or traps being freakishly huge cause of the high concentration of androgen receptors being a tell-tale sign people say look at the shoulders, but you'd be surprised.
A lot of people have shytty delt genetics on gear and you wouldn't even know they were running shyt. There are some easy signs like the androgen receptors being huge, lots of lean mass at low body fat, etc. but there are some people that are taking shyt and you wouldn't even know.
I usually say that more people are using than you think, even amongst non-professional bbers, powerlifters, or athletes.
A lot of individuals with west/central african genetics tend to hold more intramuscular fat (muscles look bigger) and are more vascular at higher body fat percentages so keep that in mind when looking at somebody.
Genetics play a huge role in this.
End of the day, just gotta bust your ass and work as hard as you can at your goals.