Hey Robert,No. But, I don't use the voice commands to select songs often. When I have, it's worked, surprisingly better than trying to do some navigation tasks. I'll try again, more in depth, this weekend.
In the meantime, perhaps it's a firmware issue? Can you please go into Settings->General->System Information and let me know the firmware version? I only need the string that starts with REL. Also, do you have built in Navigation, or not?