I focus more on readability and efficiency of the code (when it runs) but I agree his code is very concise in the latest iteration he produced. You have to really think about why he chose to do it in the way he does it. One reason is the less lines of code the easier in theory it is to review and maintain but this is only true sometimes. It also has to be following certain coding standards etc.

Just my opinion and I'm not even a great programmer. I just read a lot of code.