Does Smartthings work off line?

[sidjohn1]

hubv2 with internet down event

I try to test my newly received v2 hub, one of the test is internet down event. I notice that when the v2 hub connected to internet, i still have some lag when the motion detected and to turn on a wall switch for a light. but when i disconnect v2 hub from internet, it seems the event operated faster. does anybody notice the same behavior ?