I'm surprised it is this widespread. Robert reported Southern OC, I'm mid to Northern OC, and you're in LA. It really does show how important B41 is. B25 is so congested it's barely usable. On my commutes to and from school I would be constantly in and out of B41 (mainly on B41), which is great. Yesterday however, I noticed it was mainly 3g with a few B25 spots. Hopefully it gets resolved soon.
I thought I was getting throttled because I looked at some forums and Sprint said the top 5% mark is around 5 gb (which I find hard to believe is that low). So I figured when they throttle they drop you down to 3g but Robert stated that is not how it is done.