Found it:

On The Future.
13
Madeupname asks: It’s rumoured that Andre 3000 wants to make a record with you. Would that interest you? What criteria would you have for collaborating? Is there anyone in particular you would love to work with?
Squarepusher: The main criterion is the lyrical content. I wouldn't want to be another production vehicle for some Outkast derivative style pop. I would have to probe his intellect to see if we could come up with some sort of agreed standpoint on lyrical content. I suspect that there is a bigger cultural divide across the Atlantic than people think. It's easy to wash over that with time honoured themes of sex + love etc, but if one wanted to go beyond this consensus lyrical territory, I dare say the cultural differences would start to become clearer. We'll see.

http://www.bbc.co.uk/dna/collective/A16411088

Yeah.