Yea, I wouldn't count on that. It seems a little too soon with no real information being released on it yet, least officially. It seems like we knew pre-orders for recent phones were known about more than 2 days ahead of time.
We have some confirmation from Canada. This is a reputable website.
"Apparently Samsung will be hitting the road and travelling across Canada giving employees from all carriers an opportunity to “experience and learn about this extraordinary, highly-anticipated device.” The “Galaxy S III interactive training sessions” begins Wednesday, May 30th and ends on June 27th… So this could mean that the official Canadian launch (possibly also in the States) might happen on June 27th or 28th."
Fair enough. At least, from what unsubstantiated sources that have posted, I think it safe to say that a mid-June release is reasonable and that a 199-299 2 year contract price is as well. Accessories and unlocked US versions appear to be on Amazon already.