I think it also depends on what style of scalping you intend to do.If your used to scalping 200 times a day with 64 proprietry orders and a proprietry Nasdaq level 2 system,where you hardly look at a chart and completely interact with the screen then scalping the NYSE is rather slow and cumbersome and impossible.
If on the other hand you look at it in a much slower fashion as i have, this is what i found.I got so frustrated at times thinking if only i could do this or if only i could do that as i do on the Nasdaq.However when i took it slowly and accepted it for what it was then yes it works.But i still like using it for swing trades and entering a stop using the superdot system which although slow to act works very well.Many times i found my swings would end up as scalps.
I missed the speed.When the specialist opened the spread i missed jumping infront of him to buy on the bid,i missed hiding my orders,i missed the confidence of seeing where my stop was and knowing that i could get it.I missed getting fills outside the spread.I hated the manipulation of the spreads and one thing i noticed, the specialist would at times with the last two orders of the day engineer large orders to go off at key support or resistance levels away from where the stock was trading, so when you looked at a daily chart it gave a false reading of where the trading truly was happening at the close.
Even though i use superdot, the fills where so slow.I missed the interaction of all the many players watching their moves and fakes.I missed the liquidity of all the ecn's.I missed the NASDAQ.
I enjoyed the flirtation but i know where my heart lies. 🙂