Snow tires prevented a fender bender

Got new Blizzaks on (225x40x19 front and 255x40x19 rear) a few days ago. Big snow storm last night. Today, I'm driving in town on snow-packed streets. As I approach a two-way stop intersection (no stop sign for me), I see a UPS truck coming up to the stop sign on the right. Then, like 25 feet from the intersection, I notice the UPS guy is sliding. I gently apply my brakes and steer to the left. He slides through the stop sign and all the way out into the intersection before he stops. I stop about 10 ft from being plowed into. He looks over at me, smiles and waves. I suppose that's a better outcome than the headline: "UPS Driver hits IS-F. Pulled out of truck and assaulted".