So far, everything I have tried my game on has worked very well.. all gens of iPads, Droid phones, HTC Flyer, Fire, Playbook, etc.
The one notable exception so far is the Toshiba Thrive 10" tablet which seems to run about half speed of all the other platforms (even iPad 1). This is a Tegra-2 tablet so it should be capable of pretty good performance but instead it is sluggish, especially on the physics stuff. The colors do not look accurate either.
Intel i7-2600k - Asus P67 Sabertooth - 16GB RAM - 2x GTX 460 OC SLI - Lexar 128GB SSD Drive - 2TB ATA/600, Windows 7 x64. iPad, iPad2, iPhone 3GS & 4, HTC Inspire, Mac-Mini. Apps published: 3