Any app I build in the future will be created on a droid powered device first. I have learned the hard way to shoot for the lowest performing platform first as it is nearly impossible to port the other direction.
Not entirely related to this posting but I would like to know why you have made this conclusion? I have ported an iOS application to Android and found it to be easier. In a way, it almost makes perfect sense that if you build an app on a locked down platform (foo) it should be much easier to port to a more open platform (bar) since you are "practically" guaranteed that bar will have all of the functionality of foo and then some....no?
grep me no patterns and I'll tell you no lines.