On Thursday, March 12, 2015 at 8:17:53 PM UTC-7, JS wrote:
Thanks, Kirk.
As previously pointed out, ADS-B will not react well to things like a glider on tow or worse yet in a gaggle. It is designed more for IFR separations, and alarms will go off for what you'd consider a non-event in a glider..

ADS-B does not react to anything, it is fundamentally a protocol for transmitting aircraft identifying information (including the type of aircraft, of which 'glider' is one possible type), positions, and velocity vectors. Any 'alarms' that may be triggered are solely a function of the receiving equipment. FLARM has several advantages over ADS-B, not the least of which is the ability to enforce updates to its protocol every few years (rather than being stuck with update cycles measured in decades), which, strangely enough, is precisely what people were complaining about. But, there is nothing preventing implementation of more glider-appropriate ADS-B traffic warning capability, if someone was interested enough in doing so.

Marc