When I specify a google font by name for the “General Font,” such as Lato, bold text is not rendered as bold. This doesn’t happen if I select a “Theme Font.”
See example: http://beta.chrislott.org/2014/05/06/link-log-beta-2020-01-02/
Note the text at the tail of the second entry that reads “My witty, profound comments on this link would be right here. In bold. Wow.” — inspector shows the text properly wrapped in tags, but it is not rendered as such.