You can stay competitively gaming all your life irrespective of the fact you don't appear to understand even quite straightforward mathematics. The fact that you even think that a monitors refresh rate speeds up your brain is worrying enough to me. Or perhaps you're some frankenstein experiment, with electrodes sticking out of your head into the TV...
I feel sorry for everyone commenting about things they have never experienced or used before.
There are a WHOLE lot more to monitors than refresh rate and response time. GAMING monitors handle input latency a whole lot better than normal monitors. A typical LCD has an input latency of 20-100ms. Gaming LCDs typically are overdriven and have a input latency of 2-10ms. If 18-90ms isn't a difference to you, then your brain is slow, and you are handicapped.
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If only Apple made a 120Hz monitor, you sheep would wait outside the store for opening day, just to purchase it blindly, not knowing anything about it.
To the OP, I would suggest going to a gaming forum to ask gaming questions. Clearly these people have absolutely no idea what they are talking about. I would recommend ESEA.net, HLTV.org, or my site FRAGBOSS.com. You can email me anytime with any questions as well, ethan@fragboss.com.