This is really just a note of the real enmity Google has towards Microsoft and Windows Phone rather than a complaint. Google has updated the web interface for Gmail on web apps for Android, BlackBerry and Kindle Fire to the iOS web interface.
The odd one out is of course Windows Phone, and I think its pretty easy to see from the screen shots above which one is the Windows Phone . The WAP interface would not look out of place in 2003, let alone 2013.
Given that Gmail is my spam account I could really not care less, but I think it is useful to highlight that Google is far from fair and equitable towards their users, and if you find yourself using a Windows Phone do not expect Google to care about your custom for their services.