They're heavy and take time to load! It's more noticeable on such a
text-heavy page as this, too.
I might make a similar change on DTI… I had used these fonts here for
visual consistency, but tbh I'm not sure these fonts are notably better
than the system fonts anyway! And our brand identity isn't hinged on
them. (Whereas I *did* keep the Delicious fonts, because the files are
notably smaller, and they *are* more part of our visual identity, I
think.)