The design of Pathfinder hasn't really changed as far as fonts are concerned. The tiling step is what takes most of the CPU time, but fonts don't benefit from tiling unless they're very large. Most of the changes thus far have been for SVG.
BTW, were you aware that links to your older blog posts (e.g. [1]) were broken? Looks like you just removed "/blog" from the path, but you don't seem to be doing anything else with it.
