Hi,
Thank and welcome!
It may be faster than 1 in sec, look at http://ksduino.org/?devices&device_parameter_id=9 for example it sends 10 values per secont. We use UDP to send & receive packets and Arduino and KSduino can send & receive more but the KSduino is public online service and I don't recomend increase your speed more then 1 value per second in your tests.