Fills with Globex (through IB) are very fast, 1 to 2 seconds. Long and short times are the same. Stops are very quick. If the market is moving fast, the fill time can increase for a market order to 5-10 seconds, although limits will execute fine if it hits your price. Stops in a fast market can really be a problem -- the stop will hit but by the time the stop market order gets filled, the price can be dramatically different, even though it just a second or two later. Fortunently, however, these are rare occurences. Unlike with tymjr, IB has been very reliable for me with the ES.