The stock Android browser fell behind in late 2010. If you follow PPK of quirksmode.org you know this (e.g., the following article was authored just before stock android fell behind: http://www.quirksmode.org/mobile/browsers.html). After that article he really began hating all over Android due to the fall-behind.
Basically, Google mostly abandoned the stock browser because they wanted to focus everything on Chrome for Android. They accomplished this last year, and it fixed virtually all the HTML5 complaints that have been leveled against Android. Chrome is only supported on Android 4+. Android 4+ devices are on track to become the best-selling Android phones of all time, such as the S3 which singlehandedly outsold the iPhone in August. In a year Android 2 & 3 will have negligible market share, as Froyo does today (15%).
Android with Chrome is at least as good as the iOS browser -- probably better. So this isn't a problem here.