It definitely is.
Years ago I took my 15 year old sons to a Guitar Center just to look around and one son saw a Gibson SG doubleneck hanging on the wall. He said "Dad I want that one, can you get it for me?"
Not wanting to disappoint him but also not wanting to drop thousands on a whim I said to him. "Ok, strap it on and if you can wear it for 15 minutes I'll buy if for you."
So I strapped it on him and after about 8 minutes or so he said "Take it off!!!"
After I took it off him he hung his head and said "I see what you mean."
i ended up buying him a Les Paul Studio Plus which he loves. We still go to guitar stores like the pic at Rudy's below but he now understands that weight is definitely a thing.