Was interested in GSF calls a few days ago . The spread was 290x320 and I placed a buy at 300. Nothing changes. After a couple of minutes I call IB to find out why my order isn't showing. While I am on hold waiting for a rep the spread goes to 295 x 330, then 300x 340, which of course is when the rep comes on and says my bid is showing at 300. I mostly trade NAZ stocks and am used to almost instant postings of my order and a 5 minute delay seems like a long time to me. Do orders routed to CBOE still go through a system of having the order relayed down to a floor trader where they can be sat on while they watch to see which way the market is going ?