To be fair Google knew about the iPhone well before Microsoft did (they worked closely with Apple in the beginning for Maps and search). But even adjusting for

To be fair Google knew about the iPhone well before Microsoft did (they worked closely with Apple in the beginning for Maps and search). But even adjusting for that it took MS 3-4 years after the iPhone to just get Windows Phone 7 out, and that was also clearly a rushed release, because they had to throw everything out for Windows Phone 8.