10th looking more and more likely, it's not June 7th either and probably not June 8th, the first wasn't on the list of dates Marcus was given to record for the advert, the second Marcus said he doubts and is not the provisional date he has been given so is probably not on the list either):
Marcus Bentley @marcusBBbentley
@alexander_zara @bigbrotherxtra I doubt that we'll launch on a Fri as the 1st main show will be on a Sat which is historically viewed less
Zara Alexander @alexander_zara
RT @BigBrotherXtra: @marcusBBbentley Marcus can you confirm or Deny 8th June 2012 BB launch night ? - Slots are showing marked for BB xxxx
58m Marcus Bentley Marcus Bentley @marcusBBbentley
@alexander_zara @bigbrotherxtra I can't confirm or deny anything Other than to say that the provisional date that I've been given isn't that
Would fit with the latest launch yet except last year thing as only BB1 launched later than June 9th not including BB12. If there was any date earlier than BB11's on the consideration list it was probably the 6th and I doubt they'd consider the 6th but not the 7th since moving from Wednesday to Thursday if there's too much competition makes more sense than moving earlier.