4.1 did not fix all the problems: many people (including me!) find that the OS is still much more sluggish than it was on 3.x. I still see delays of up to sever

4.1 did not fix all the problems: many people (including me!) find that the OS is still much more sluggish than it was on 3.x. I still see delays of up to several seconds in between keystrokes when typing sometimes, which makes typing really unpleasant and frustrating. It tends to get worse over time until I reboot my phone, given that the iPhone 3G has less RAM than the 3GS or 4 I guess there's a memory leak somewhere that hasn't been fixed, but there's likely other issues too. It really did feel like Apple didn't even bother to test the iPhone 3G, which is madness.