Than why doesn't the iPad 2 have Siri ? It's got a microphone also? Argument doesn't make sense. iPad 2 has a5 processor and it's clocked at a higher speed than iPhone 4S.
I don't know why the iPad 2 doesn't have Siri. I never made any argument against that. I was speaking solely on what the OP had mentioned in the thread title. I'd personally love to see Siri on the iPhone 4 or even 3GS and on the iPad 2.