Change Group Delta

How about adding a command to cause a change group to send updates based simply on member changes? Currently you can explicitly ask for an update(cgg) or schedule automatic updates(cgs) with a minimum period. The latter is close, but you can only go down to 1 second, which results in a sluggish appearance of the controlling application. I would like to be able to just register a bunch of controls with a change group and then get updated values as they change in real time.