To answer WHO is TwinStar, it could very easily be a DA-42. When I'm getting flight following with NY Approach, I'll be referred to as "Skyhawk 123" when flying a Cessna Skyhawk 172. That could certainly get confusing with Daimler Chrysler Aviation, but likely they're inbound on an IFR flight plan, and unlikely there would also be a DA-42 near the ILS approach at the same time. Still, it's ambiguous.