Google's kerning appears to be perfectly logical, mathematically speaking, according to the rules pointed out in the article. Rounded letters have a larger perc

Google's kerning appears to be perfectly logical, mathematically speaking, according to the rules pointed out in the article. Rounded letters have a larger perceived space and so they need less kerning space. The difference seems to come down to whether half-round letters like the G are treated the same as the fully rounded letters like the two o's. To my eyes they look a bit different, but I can't say that one is any better than the other.