Found this critique of Google+ from an insider on Hacker News:

Google declared that “sharing is broken on the web” and nothing but the full force of our collective minds around Google+ could fix it. You have to admire a company willing to sacrifice sacred cows and rally its talent behind a threat to its business. Had Google been right, the effort would have been heroic and clearly many of us wanted to be part of that outcome. I bought into it. I worked on Google+ as a development director and shipped a bunch of code. But the world never changed; sharing never changed. It’s arguable that we made Facebook better, but all I had to show for it was higher review scores.

As it turned out, sharing was not broken. Sharing was working fine and dandy, Google just wasn’t part of it. People were sharing all around us and seemed quite happy.

A user exodus from Facebook never materialized. I couldn’t even get my own teenage daughter to look at Google+ twice, “social isn’t a product,” she told me after I gave her a demo, “social is people and the people are on Facebook.”

Google was the rich kid who, after having discovered he wasn’t invited to the party, built his own party in retaliation. The fact that no one came to Google’s party became the elephant in the room.

I know that Google claims that Google+ is just a layer that adds social to all Google products, but I still wonder why if that's really the case Google Contacts is so awful.