I have seen posts to this effect and am just confirming that my experience has also been terrible with the original equipment all season Bridgestone tires on my 2013 Grand Touring. I ordered snow tires for my GT shortly after buying it on December 29th but they were not delivered before I had to drive in light snow. I think there was about 2-3" on the ground and the rear end broke loose while I was going around an exit ramp at 20 mph. The ABS kicked in as the CX-9 started to slide but this did not do much to save it. I lifted off the gas and that had more effect. This has never happened before with any of the 12 previous AWD and 4WD vehicles I have owned since 1990. I am an experienced winter driver - grew up in western PA and spent a lot of time in Vermont. These Bridgestone Dueler H/L 400 tires are treacherous even in moderate snow.
I installed 4 General Altimax Artic snow tires on 17" rims in the size recommended by Tire Rack and the difference is dramatic. We have had multiple big snow storms in January and February and the Altimax tires have performed very well. In my experience, the Michelin Latitude X-ice and Bridgestone Blizzak tires will outperform the Altimax tires but not by a wide margin. The Altimax tires are much quieter on dry pavement than the Blizzaks. I have been very satisfied with them in a broad range of winter conditions.
I installed 4 General Altimax Artic snow tires on 17" rims in the size recommended by Tire Rack and the difference is dramatic. We have had multiple big snow storms in January and February and the Altimax tires have performed very well. In my experience, the Michelin Latitude X-ice and Bridgestone Blizzak tires will outperform the Altimax tires but not by a wide margin. The Altimax tires are much quieter on dry pavement than the Blizzaks. I have been very satisfied with them in a broad range of winter conditions.