There are two aspects I see. One, Google may be enforcing more aggressively and less consistently.
Two, the differing initial demographics. Facebook initially launched to college students and they established its initial environment. G+ started with the technorati, many of whom care deeply about this. Some of whom have handles going back longer than Google has existed.
Two, the differing initial demographics. Facebook initially launched to college students and they established its initial environment. G+ started with the technorati, many of whom care deeply about this. Some of whom have handles going back longer than Google has existed.