Blaze has released a study stemming from 45,000 Android and iOS tests, the Android's browser posted faster load times on 84%. On average, pages loaded in 2.1 seconds on Android -- about 52% faster than mobile Safari. Median load time was 2.144 seconds for Android versus 3.254 seconds for the iPhone.
The devices used for testing include a Nexus One running Android 2.3 and an iPhone 4 with, presumably, iOS 4.3. Both operating systems sport WebKit-based browsers.
It’s worth mentioning however that whether the webpage viewed was optimized for mobile devices made a difference. While non-mobile sites had a median load time of 2.180 seconds for Android versus 3.463 seconds for the iPhone, on mobile sites the difference was practically non-existent: 2.085 seconds for Android versus iPhone's 2.024 seconds.
Blaze does acknowledge that a perfect page load test is practically infeasible. The amount of unique variables that factor into browsing performance is staggering, and trying to standardize each one would be a waste of time and resources. So, while this isn’t definitive by any means, it definitely favors Android, and there’s something to be said for that.