Android´s biggest problem: their manufacturers
My first and (for now) only Android phone was the first Samsung Galaxy S, at that time (a couple of years ago) the hardware specs where not as powerful as they are now, but still Android 2.3 was profiling as very nice mobile operating system.
Today, statistics by IDC show that the market is 75% Android, 17,3% iOS. But this could change very fast.
You can check the Worldwide Mobile Phone Sales to End Users by Vendor in 1Q13 (Thousands of Units) chart on the following link from Gartner.