It's all relative mate. If he's natural, then yes, you'd think so, but everybody's different.
If he's on gear, he's got a greater chance for recovery, but it's still an over-kill IMO. You wouldn't catch me doing that much TBH. I do about 2 sets a week (sometimes I forget) & mine are slowly growing. People forget that your biceps get a huge amount of work when you train your back.
Even squats help your arms. Squats help EVERYTHING.
