I was fourth or fifth in line over a mountainous route in IMC with the concern being potential for icing. Everyone else got through ok but I got clobbered and had to turn around (the airplane had no de-ice equipment, nor did the others in front of me) and descend below MEA for a period to keep from stalling. It was the worst ice I had ever seen. So, just because the others got through ok is no guarantee that you will...