This may not be of interest to you as the advice comes from Steve Jobs, but there is a short piece of relevant advice in the video here. Thanks,
Linux-with-Qt-required is BETTER than Linux-with-any-and-EVERY-toolkit-going, for mobile purposes. This is because as well as good native performance, it can provide a more consistent user experience across different applications and devices (when developed a certain way), which is extremely important in the mobile space in order to achieve better usability (i.e. ISO-9241 effectiveness, efficiency, satisfaction, and ease of learning etc). This is the kind of thing that helps a 'platform' to gain traction with the actual public, which in turn brings more developers in, etc. Of course as you are probably aware it also provides a cross platform IDE, or even the option to develop within Visual Studio if desired. It also means that optimisations can be concentrated on one area/toolkit rather than across multiple different toolkits.