1500 ft horizontal and 200 to 300 ft vertical sound like they had things well under control.
I turned to get out of the way of a twin turboprop that ATC had helpfully descended me in front of. 100 yards was more like it; yes, that was a hard left turn.
Another twin turboprop nicked the side of the thermal I and another glider were in at an altitude between us.
Suspect they both were enroute YYZ-YXU at 5000 and 4000.
No xpdr, no TCAS alert -- keep those eyes open.