They do in my town. You have to smack it repeatedly until a white "warte" or "signal kommt" lights up on the signal at the other side of the road, or else it never will change.
They also don't vibrate or give any auditory signal (except when the actual green walk signal comes)... I'm not sure how a blind person could use it because their sensitivity is so low that you have to keep touching, pressing, smacking the touch surface until it registers you and updates the (purely visual) signal on the other side. I ended up just crossing illegally at one crosswalk because the damn thing just wouldn't work.
It's specifically the ones with three dots in a circle that are only there for the visually impaired. Some vibrate, some have a spinning thing on the bottom.
If they don't have the three dots in the circle they usually do control the lights. Newer models also show a red light on the side of the button when pressed, similar to the UK lights just more subtle. But there are also plenty of old buttons around that don't.
Whoa, I had no idea this was one of the main purposes of them. From the other comments, it seems that some need to be pushed to change the lights, however, I'm glad to know that some are just for accessibility. Now I'm also not sure which is which :-D
They also don't vibrate or give any auditory signal (except when the actual green walk signal comes)... I'm not sure how a blind person could use it because their sensitivity is so low that you have to keep touching, pressing, smacking the touch surface until it registers you and updates the (purely visual) signal on the other side. I ended up just crossing illegally at one crosswalk because the damn thing just wouldn't work.