These specs are actually fake, along with all other SGS3 specs, designs, pictures etc.

Samsung have made it very clear that due to the worry of competition copying them, they will only announce the SGS3 when its release is imminnent.

I don't blame them for this, as when Apple was the market leader, it did the same with its iPhones, announce and then release them straight away. Until then 100s of fake specs and designs would circulate the internet to create drama, demand and discussion, some were probably secretly released by Apple themselves for promotional reasons.

I'm sure Samsung is doing the same as they now have the smartphone crown and who can blame them.

However I do think the specs you have outlined are not too far off from the actual release we will see, who knows the actual specs may be even better (or worse). Only time will tell