Let me just say right now that I don't even really care that much about the issue here, as others have said it's pretty much old news, but I'll just say that I always read that line as:
'Latest-gen graphics engine with DX10 and DX11 API support.'
i.e. the 'API support' refers to both DX10 and DX11 equally - it's easier to see that when you don't highlight the bit that supports your take in different coloured font. It's even easier to see when you don't add a hyphen that isn't in the original
Anyway, I've got wrapped up in some stupid arguments on this forum but this one may take the biscuit. May I be struck down by lightning if I post in this thread again...