New college records in women's mile, men's 3k and 5k. 8 UWs milers under 4. 7:36 NAU, 7:55 in Arkansas got 15 place. And it's only January. Compared to 5 years ago, how much of a difference are shoes/tracks making. Feels like a 2-4% benefit. Are we recalibrating mid-long track records via technology?