It was not meant to behave like text as such. It was a quick before-breakfast response to someone's "how-to" request. Processing.js is a visualization language, not a replacement for browser technology, apologies to those who were expecting some kind of all-singing miracle-link.

It's cool for what it is, I was just wondering if it had some advantage over images that I couldn't yet see.

Well someone requested it as a demo because they are creating an interactive canvas program in which the text being displayed will change every time the script is run. Obviously that makes using images impossible. With regards to using images for the glyphs, it's slower and requires more KBs across the board.