According to wikipedia, SemiAccurate is a news/opinion site similar to The Inquirer. Is there enough information about the DX12 API yet to confirm this?

Charlie of SA used to write for The Inquirier. He has some damn good sources. I cannot recall a time when he was ever wrong, and he's broken some big stories (things like the Nvidia 8800/9800 GPU failures).

Out of all such rumor sites (Fudzilla and BSN being two other large ones), SA is the only one worth taking seriously.