David Ojeda The cache is no longer shared between origins so there is literally no benefit to serving up from googlewebfonts, bootstrapcdn etc. any more. If you have your own private CDN like Amazon CloudFront you may as well just copy the assets there now and be in full control.

NostraDavid Indeed, looks like they went ahead and chose sidechannel leaking privacy over perf. If you follow a lot of the discussions they claim there's little to no perf benefit from using caches. I wonder how many of their tests and experiences were on fat company pipes and gigabit home internet connections... :(

For popular fonts this will likely be slower and use more network access. If they have already visited a site that uses the font you use by putting ?text= on the end you're forcing the browser to go off to Google to get your subset even though the full font file is sitting their in their browsers disk cache.