Some light googling shows "The average combined [gas + electric] bill has increased from approximately $179 in 2020 to around $300 by October 2025". I'm not sure what cherry-picking of data PG&E is doing, but it does not seem that there's a real life 10% decrease in bills being paid by California consumers.
they mailed me a thing a few months ago saying "we're lowering rates!" and then another thing more recently saying "See, we're lowering rates and plan to lower them again soon!"
I haven't actually looked at the real bills to see if it's happening, but the expectation they're setting up is that 2026 will be lower than 2025. we'll see!