[innocenat]

There are also another advantage: font subsetting. Google Font automatically subset large fonts. This doesn't really matter for Latin, but for CJK where an entire font can be >10MB, Google Font automatically subset it into >100 files, partitioned by the general usage frequency.

I served my own fonts, but subsetting those font aren't trivial matter. Personally I just grabbed the unicode range that Google Font used and generate my own subsets, but it is not that trivial.

(The reason I served my own font is actually because some font on Google Font are not up to dated, and I actually abuse the unicode-range to use different fonts for different scripts)

[chrismorgan]

I was talking specifically of the advantages of global CDNs. Font subsetting is something Google Fonts covers and handles very well for the most common use cases, but is nothing to do with the global CDN.