which platform is better for mobile embedded programming with Qt

Hi,
Am new to Qt and in a group where we used Linux to write a program in c for embedded mobile but want to make it more user friendly so we want to use Qt. Now the choice is which platform is better to use in terms of programming support, ease of use and fastness (very important); is it Linux or Windows?

Thanks.

I don't have large experience with Embedded but from what I know Linux makes a much better embedded host especially when performance is an issue.

We use Linux on the development hosts but I would say that it depends on what OS your target is running.