Kortunov's design is old, so other designers might have copied it, but look at these, anyway, because they all have similarities to Google's new icon, and they

Kortunov's design is old, so other designers might have copied it, but look at these, anyway, because they all have similarities to Google's new icon, and they all predate it by years: http://freshtutorial.com/wp-content/uploads/2011/09/Big-Google-Plus-Icon-575x402.png http://freshtutorial.com/wp-content/uploads/2011/09/Big-Goog... http://takedesigns.com/wp-content/uploads/2013/02/free-2.png http://takedesigns.com/wp-content/uploads/2013/02/free-2.png http://designurge.com/wp-content/uploads/2013/09/g__by_mauxwebmaster-d420wxx.jpg http://designurge.com/wp-content/uploads/2013/09/g__by_mauxw... I think it's just a case of parallel evolution. Mix up a blend of influences like Google's existing primary color-based design, Microsoft's Windows Logo, Google Chrome logo, and some aesthetic sense, and you'll get a lot of logo designs that look similar. This article is interesting, but it has a terrible title and overly-confident conclusion, which is not supported by the evidence