Have you perhaps confused it with Unladen Swallow, which is a set of performance-enhancing patches for Python (originally 2.x, now 3.x) that originated in Google?
Py3K was driven entirely by the Python community. Granted, Google has snatched up quite a few Pythoneers over the years, including Guido van Rossum himself, but there's nothing in Py3K that would make it more suitable for Google's needs.