Mountain lion making everything run slow

Hi guys
since downloading and installing Mountain lion on my Macbook Pro feb 2011 i have been having a long lag when running safari and basically any other apple apps i try to use that need to connect to the internet.
on safari it takes so long to load anything that it times out or comes up with a message saying safari cant load the page. although my internet with sky is slow (between 500-800kbps) however it is not slow enough to do this. it is particularly difficult to load data rich sites like bbc or facebook.
1. can i reverse the install and go back to lion
2. if not is there anything i can do to stop this happening.
3. HELP!!! its driving me insane!
thanks
Aimee

I have the same problem with a MBAir with 2GB of RAM. The system was very fast before mountain Lion. Now I have the same problems I had before with Snow Leopard. The Keyboard is slow (I write faster than the keyboard is able to respond), the browsers are slow to respond. I have a solution that helps a little bit whish a little app called "Free Memory" and yes, zap the pram helps also. There is another app called Onyx that can fix things. You may have disk permissions issues after the install. I reccomend this before you roll back your installation. I really regret that I upgraded...hopefully Apple will fix things soon in the meantime I just have to live with it and be carefull with memory eating programs like google chrome, safari and Proclaim. I should have known better and waited a couple of months befor upgrading on a 2009 MBAir...

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Mountain lion making everything run slow

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