No longer Apple Brand Ambassador-iPhone 3G slow on OS4

am extremely disappointed about the performance of my iphone 3G since I have updated to OS4. As a loyal customer and brand ambassador I expect more! I have convinced by wife, my parents, brother, sister, boss and countless friends to own an iPhone and was even tempted brave the elements and get in line to get the iPhone 4 in its launch here in Australia. I am now re-considering my next purchase.....
My confidence in Apples pursuit for a quality execution has been shaken due to this dodgy upgrade. Using my iPhone was always a pleasant and enjoyable experience but now it is just very frustrated. I have to wait intolerable amounts of time for simple functionality like SMS!!
If you havent upgraded to OS4 DONT!
Unless I am plesantly surprised by apple in near future I will feel no option but to express by disapointement in the Apple brand publically and persuade other buyers to go else where.
3G iOS 4