However it is known fact that bigger RAM is really useful, don't tell me you never experience annoying refresh when switching between tab in safari, 3 tabs are enough to trigger it, not to mention any game that need to close everything in background just to run it properly. I'm not said bigger are always better, optimisation play a big role too.

1gb RAM is not acceptable with this new gen-iphone. Not to start with other things. I'm using apple product, both iphone and ipad retina mini, and I admit the flaw, not just blind follower that praise every apple product released.