Completely this.
And this. His upper body certainly should get bigger though.
I hear what you are saying and it will get bigger. If anyone wants to gain mass and bulk they can pretty quickly with the right regiment and diet. If someone wants explosive gains it will take longer...and diet will be more important to sustain gains and keep a body from going catabolic on his muscle. For his body type it will take time and i predict he will be fine. The gains ive seen him make every year are extremely noticable to me.
There is a difference between the work someone puts in to just look good at the club, the gains powder puffs make....and the gains of a specialized pro athlete getting paid 100k a night.
And to clarify...powder puff... Is a reference to water weight gained through additives in most commercial protein shakes and supps like creatine and nitros (which again often include water retenders in the mix as filler and to cater to masses with illusionary results) and also test en, anabol, dia and other steroids. Your basically making youself a girl and gaining water weight... Looking like a pregnant lady storing water to feed two incase nature doesnt provide (the body doesnt know there are things called grocery stores) is not strength. For powder puffs its fine because they want to look bigger and arent in a competition where they need to be on a cut cycle...plus the water retention provides a bit of extra lubrication for joints, especially steroid water retention which is why steroids are prescribed in the first place. This allows you to push higher weight and quicker recovery times when on cycle. Problem is that those joints and tendons didnt get worked for the new mass until you drop the girly water weight...then they are in for a shock. Long term there is going to be damage and any lifter thats gained alot in a short period using these supps and has been involved for quite a while can attest to the issues and has far more tendon and joint issues than comparably physical strained athletes who maintained natural vascularity.
Nuge is clearly eating a clean high protein diet with no additives. He can afford to do so where as most builders simply can.t be eating and drinking the kind of high quality protein he needs to. He also doesnt need the water retention pregnancy lubricant for his joints because he is training them properly to earn money long term and be the fine tuned elite athlete he is paid to be. He isnt putting on mass to attract barely out of teen girls at a club with his bloated biceps. He will increase weights on pace with his bodys ability to sustain support.
Nuge cant go out and pack on commoner weight with commoner food and he cant cheat with quick fixes if he wants to maintain his finesse and guard his tendons joints and support muscles. Anyone can bulk and bulk fast if they dont need precision or...health long term.
Frankly he looks in tip top shape for his frame.