Is it true the girth gains hinder length gains?

A guy that I know grew from 5 to 6 inches in girth taking L-arganine + steroids + fitness + newbie routine with lots of stretching, as well as from 6 BPEL length to 7.5length.Than he grew from 7.5 BPEL to 8.7 BPEL with only hanging.

So in his case the gained girth didn’t affect his ability to gain length.