First of all, the racial gives you 204% crits,

https://twitter.com/Celestalon/statu...93687358078977
Second, It only takes a 33% crit rate to get a 1% boost. This is because at 33% crit chance, half of your healing and damage is coming from critical strikes.

Third, Crit has diminishing returns built in, since going from 0% crit to 1% is a much bigger gain than going from 99% to 100%.

When you factor in all of this the Tauren/Dwarf racial moves ahead of 1% crit when you reach 25% crit chance.

Check out this graph for an illustration:

https://www.wolframalpha.com/input/?....01%29%29+%3D1