OS4 and iPhone 3G

My experience with OS4 upgrade on the iPhone 3G has been devastating so far. I think with this upgrade Apple may have released something which users can misconfigure in a way that makes the applications really slow. Most of the time I am reading news or mail, my phone has now become unresponsive. Several clicks or attempts to scroll the window down are met with tough resistance almost as though the screen has become insensitive to my touch. I am planning to spend some time tomorrow to find out what kind of tuning I can do on the phone to make it faster and more responsive...