I can give a good reason why google fonts is a bad idea: some countries are not Google-friendly. Just like trying to deal with Twitter and Facebook apis thrown carelessly all over the web; generally accomplishing nothing and usually called when not needed, google fonts is just another way to bog down the experience.
I can see the benefits of clouding, but not as a starting point for a self-hosted project framework. I find it weird that there's a downloaded font-squirrel font "Genericons" in the theme, but still it seemed necessary to include a call to the google fonts as well.
Anyway, thanks for the "Disable Google Fonts" plugin link Cyril, it also worked perfectly for me.
I added this comment just to point out a reason. I've seen a few others trying to figure this problem out, including adrelanos, but it doesn't seem to be understood why people might not want it.