User blog comment:Deshiba/Team Frost - an overhaul./@comment-128.230.200.87-20130212171426/@comment-4022742-20130212173113

3 seconds, still mitigated by Relentless and Boots of switftness, still cleansable, removed by QSS and several champion skills. In adition the player himself removes it to do extra damage instead of slowing.

Ashe allready had the 35% slow on EVERY auto attack instead of just with skills, now the slow is 3 seconds on skill use and you have to remove the slow to deal true damage. It's basically a trade off between slow for sustained damage or true damage for burst.