I don’t know if I’d ever put standard ES denim near the phrase wabi-sabi, but maybe this is different with the customization? I wouldn’t go so far as to say wabi-sabi can only be used with raw denim, and I don’t know if you can get raw denim at the ES shop, but something about ES just doesn’t scream wabi-sabi to me.
Here is an interesting blog post on wabi-sabi. Maybe I linked to it before, I don’t remember and am too lazy to check. I got it way back from AYN blog