If 100% of Google Reader users enthusiastically adopted Google+, would that have even come close to what they were hoping to ultimately get? That's probably a rounding error by Facebook's usage numbers.
I disagree. People who used Reader were early adopters and influencers. Perhaps it was only 8 million users from Reader, but they would have had a multiplier effect.
Now I don't have any reason to have Google Account, and so I don't have one†. Of the users I introduced to Gmail, some have since moved back to live.com (e.g. family) because they saw me complaining so much, even though they had no real reason to move.
I no longer recommend Android since after 2 attempts, watching both my phones with otherwise perfectly functional hardware have their software go unsupported and crumble into the ground as every new update got pushed. And so my mom still has a Blackberry (yep!)
† Not strictly true, I still have an apps account to forward my mail, but only because I haven't migrated the last remaining user off the domain.