I just watched this today. Please take the time to watch the report, and then go check your tires!
I just went out and checked mine in the parking lot-- the numbers were printed on the outside of the tires (so no crawling under the car... yay!). I've got good tires, it seems... they say "2507", which means that they were only a couple months old when I bought them. Gotta love Costco Tire Center. :)