I suppose it depends on how these controllers give you an edge. I'm against that if it happens because the thing is lag aside it's supposed to be a level playing field.
I do understand and agree with you Danny, but the more and more I play on consoles I just think... Why?!
It is the little details (as with everything) which make the difference. However, there isn't a competative playing field for console games, due to over saturation. You don't get major clans, major tournaments and 'major games' like you do on a PC. The market just isn't there. By 'major games' I mean games which have come out, get constantly updated and have a big community support, with user based maps and game modes. All of which the console doesn't have.
When I used to game on the PC, I could name a good 5 games of each which I was in a clan and each I was playing at a decent to high level. I have never been in a clan on a console, they just don't really exist.
It's a waste of time buying performance enhancing controllers (other than flight clicks and fighting sticks which serve an actual purpose) on a console.