What's funny is that your Nexus phone & tablet weren't made by Google, but the Moto G actually technically
was (Motorola Mobility was their subsidiary at the time).
Dennis Woodside, Motorola CEO during the Googlerola era, had been at Google since 2003. I can't imagine that Google had nothing to do with Motorola going (near-)Vanilla Android. Also, the "soft" (Googlish?) industrial design of the Moto line marks a rather distinct break from the very angular design of, say, the Droid.