If I had a compatible mobile, I'll try to do for mobile phones, unfortunatelly, I don't have this choice..
Also, the performances on mobile seems to be really what affraid people, so I my case, being able to test is really important.
still, I support touch controls, because even if a mobile is not sure to make my game smooth and playable, tablets seems to (well, the level designer I work with tried on an iPad and seems to have a good experience of gameplay, so, that is still worth supporting touch inputs)