I predict that Google+ will go from 0 to 100,000,000 users faster than any other service in history.
Okay, that's a bold proclamation - here's why I think it will achieve that.
The service is great. It is timely. People are engaging with it like crazy. There are rumors that there are already 4.5m people. That might be high. It might be as low as 1m, or even lower, but my guess is that it's more than 1m people already. That already is probably the fastest growing service (0 to 1m) ever. Now it's not completely fair, since when Facebook started, and when Twitter started, etc. those were tiny companies, and Google is huge. However, the product is extremely well executed, and a lot of people are smitten.
The next year will tell. Will there be bumps in the road? Sure. Will Facebook and Twitter fight back with more innovation? Of course! But I'm saying that Google+ is already good enough, and the team on Google+ is being so responsive in a way that makes me believe they have a real winner here.
Let me know what you think. Am I being too optimistic? I can't wait to see how this next year in Social Networking plays out.