I tried tweeting Samsung on Twitter about this and they didnt reply back so ill try to email them and gosh I hope the US release isnt delayed, its so close!
EDIT: I contacted Samsung via a web chat, this is what I was told by Samsung Rep Ronnie
Ronnie: Hi, thank you for contacting Samsung Technical Support. How may I help you today?
Mathew: Hello I have a question about the Galaxy S III, I read a report that it's release was going to be delayed in Canada. Will this impact the device's launch in the US? The report said something about a shortage.
Ronnie: I understand that you want to know about the release of Samsung Galaxy S III . Is that correct?
Mathew: Yes, I am just wondering will it still be released next week?
Ronnie: Thank you.
Ronnie: I understand your concern.
Ronnie: The device is going to released on June 21st.
Mathew: Your welcome, I am a member of Android Central forums and I saw a thread today about it so I was trying to find out if the Canadian delay would affect the US, thank you for answering my question.
Ronnie: You're welcome.
Ronnie: We have no information if it is delayed or not, however the date for the release of Galaxy S III is June 21st 2012.