The results: mixed.
On the way to SFO on Thursday, I tagged my green wondercard only to hear the turnstile screech and display the 'See Agent' message. Not wanting to bother, I used the regular
Today, however, on my way back from SFO I entered the BART station to find the trains mercifully running. This time, when I tagged the card the fare gates parted and displayed my Translink balance. The exit at 16th Street was equally smooth, and showed me the new balance after it calculated and deducted my fare.
I continue to recommend that everyone get a Translink card and try to use it as often as possible.