You write command: define (‘CONCATENATE_SCRIPTS’, false);
You give it to the line in wp-config.php file, then press F5 to admin a few times for it to clear your cache, try editor to see if there was not okay!
Thats quite cool, I don’t know if I would have it on every page on a site though, it would really depend on any speed issues, and it might annoy visitors once the novelty factor wore out.
Where I do see it excelling, is if you could use on specific pages such as a featured page, etc. basically a page that you want to stand out from the rest.
I’d have to check speeds across the board but as mentalist3D said- it’s something that will be used as an everyday feature once broadband speeds are consistently high.