Maverick-- Nice call but I think you may be wishing. While I have never traded size in futures contracts, I have spent time on the floor and I am friends with and work with guys who have been on floors and I have sent orders to the floor. When I traded the big (spoo) contract I always and I mean every time except once, I got the worst fill that I could have possibly recieved give or take the few minutes of trading around the time of my order. I mean every time. It got to the point where I just looked for the worst price and I knew it was mine. Now was this a coincidence, I think not. It is why the floor loves paper, they like to screw it as hard as they can. I have heard all the stories.
Now while I do not trade size I think every retail trader who ever interacted with the floor knows what I am talking about, Heck it is why I became a member of an exchange. So just about everyone using the screen believes they would rather interact with the screen than a desk, a broker and a local.
Now I am sure there are exceptions to this way of thinking and I am sure there are some really great brokers, but there is almost no doubt about it, a good pit will lose to a good screen. The eminis are proof that the screen will conquer. And it seems to me but every month the mini seem to be deeper and the floor seems to be quiter. If I did not think this was the case, I am sure I would be leaving for Chicago tomorrow.