Of course, this beggars the question: 'If not Tera, who is?'

She's no doubt up there in the mix, but I would guess that Jenna Haze, Belladonna, and Sasha Grey (amongst other gonzo standouts) have shifted more units recently, and if we're talking the 'Contract Girl/Features/Mainstream Crossover'-type of 'Queen of Porn', then I'd probably have to go with Stormy.

I'm sure someone like vodguy could kick down some interesting knowledge about who are the true MVP's of porn.