It’s been almost two weeks since I upgraded from 3.1.3 to 4.0 on my old iPhone 3G and I must say: it’s slow!
iOS 4 feels much slower on my old 3G than 3.1.3. Apple, do you want to force me to upgrade by that? It’s annoying! I am willing to upgrade, but T-Mobile doesn’t want me to! They lost my pre-order… damn you!