Not the same way when you trading on free exchange and try to imply with real exchange market and use real money, many people become most success when trading with free exchange by after trying with real exchange they lost much money, if you wanna be success try at the real exchange without use free exchange site for trading.
Do you have any proof about it?
It is like telling them that a soldier without a proper training would be more effective than the ones who studied it.
People learn from experience and it is true but learning from their experience is their choice so if they didn't learn anything from the simulator then it is their fault.
The simulator is build for us to try out our skill to enhance it so we wouldn't risk our own or real money in order to hone it.
He has a point, one of the issues of paper trading or trading with a demo account in an exchange is that you will be able to implement your strategy perfectly since no money is at stake, but it is impossible to tell if you have the psychology of a trader with demo accounts, for that you need to use real money and it does not mater how prepared you think you are since that is something you cannot train then you will experience losses at the beginning of your trading career for your inability to implement your strategy correctly.