Not true. I have this "syndrome" myself and have found that the bigger I get the less noticeable it is. At first I thought my arm looked a little goofy, almost like my tricep was a tumor growing off the back of my arm because it seemed to disproportionate, but as my biceps, shoulders and body in general got bigger, the muscles over took my skeletal structure as it were and grew enough to "fill in the blanks".
At 180, I looked muscular shirtless and had the skinny perception with a shirt on, at 215 I just look big and my muscles look the same now as any "normal" guy at 180 or so.
I like my genetics really, my chest is perkier than a strippers fake tits, my lats are awesome and my rhomboids traps grow like a leg on an insane squat program. And shoulders with an "outward" growth? people pray for that.