Back this up with a reference. I recall exactly the opposite. Poliquin himself was an example; he wasn’t that large or heavy, but he had massive arms.
Here’s the article where Poliquin says you need to gain 15 pounds to get an inch on your arms:
“In general, improvements in arm measurement are related to gains in lean body mass. A good rule of thumb is that for every inch you want to gain on your arms, you need to gain roughly 15 pounds of equally distributed body mass. In other words, to make significant improvements in your arms, you have to gain mass all over your entire body.”