"While the Mars Curiosity rover is the most complex machine NASA has ever sent to another planet, the computer that runs it is no more powerful than the one in your smartphone."
"The Mars Rover's direct-to-Earth data rate peaks at 32kbits/sec. In off-peak periods, the rate is as low as 0.5kbits/sec. As for latency, the round-trip distance is currently just under 28 light minutes, or roughly a light half-hour."