We have browser specific code for Android 2.2, 2.3, and 4. We have code just for the Kindle Fire and code just for the Blackberry Torch. Our list scroller implementation for Android Gingerbread is based on scroll position animation and our list scroller for Android 4 is based on CSS transforms. This attention to detail, and our browser-specific code, is needed to create the most compelling experience possible. It’s why people use frameworks rather than try to code to the naked browser.
Our CEO, Michael Mullany, responded to the CSS vendor prefix debate, and explains what is needed to develop for the vast array of devices available today. Compounding that with multiple implementations of a single vendor’s prefix would be a bad, bad thing.