[citation][nom]aaron88_7[/nom]Do you even realize Google+ is in a testing phase? Going public while it is unfinished and with bugs would have been stupid.Some people just need something to complain about. They complain Google+ isn't yet public, yet if they had gone public without games and bugs fixed they'd be complaining about that.[/citation]
I'm not into either site, but I see it slightly differently.
There are highly willing early adopters. They will mostly be the ones driving people to G+. Their motivation will likely peak early on. The "shiny new" view of G+ will fade, and if that happens before G+ is public, making G+ a success will be far harder.
I don't think there's much that couldn't have been tested without masses of public participation, although public testers are cheapest. Stress tests can be automated. Quality intelligent testers can find most bugs.