Waikato upgraded to a Matrix version with the JavaScript Asset Map some weeks back with Squiz NZ's help.
Since upgrading I've noticed that the speed of the Asset Map is a bit variable from machine to machine, and after initially suspecting it was a caching issue are now wondering if others have seen speed differences between devices.
Alternatively... does anyone have suggestions on how to speed up the performance of JavaScript functionality like the Asset Map? I'm wondering if simply adding RAM to slow machines might be something we could suggest.