The rest of your reply after 0.25% doesn't really apply because this is a phone, using an ARM chip that doesn't provide nearly comparable power to a desktop.
As an previous end user of a Symbian phone, the phone was slow. It started up programs slowly, it handled task switching slowly. That's the part that matters to the end user, not stats and arguments made with the modern desktop hardware in mind.
And this is part of the reason why I stopped using my Nokia N82. The other part was that it crashed so damn often when I'm using gmail and opera. To add insult to injury, microkernels are suppose to allow more graceful crashes of kernel level components.When gmail / opera crash, it's white screen, and the only input that it would take would be to power off, and then to power on. So where's the microkernel advantage here? Clearly something was wrong with the network code, otherwise it wouldn't have crashed like that. But I don't exactly call a pure white screen with no options but to power-cycle "graceful handling of crashes".