Mine did. Got $10 a while back on my Galaxy Nexus, and $10 when I set up my Nexus 7. Don't know if it's a fluke or what. I had a balance of my own money on the Galaxy, and it did not show up on the Nexus 7, so somehow the google pre-paid card is different on each device. They have different totals.
Of course, now that you can use your own cards, the pre-paid card is not that important any more