It's the same in the UK. Also I have been trying to get them to list my address for two years now. Google were able to update it but any requests to Apple seem to go into a black hole.
I can't speak to Europe, but in the US in a very rural location, I never have speed limit issues to begin with. I believe I have also submitted a couple of changes for small things, and they've all been handled so far as I can tell as I have not run into them again.
Probably typical in that Apple's services in the US are generally better than elsewhere, but just wanted to add a positive with my experience and acknowledge that it's likely better here due to location within the US.
