I've found I get better battery life with 4G enabled, whenever my phone syncs it can finish much quicker as it takes less time to complete.
Originally Posted by HNettles
I have to say one thing: it will take time, but I think this is going to put pressure on some of the big three to play ball with Google better. The new Nexus commercial is great for showcasing what you get with pure Google devices and eventually people are going to get tired of seeing those features advertised and then not being able to get them directly from carriers. Again, it won't be an overnight thing but Google is doing it the right way.