.Co domain name disputes almost always found in favor of complainant.
Filers of UDRP cases against .co domain names are now 93-1 at World Intellectual Property Organization.
These cases have all been filed since .co was relaunched last year. I’ve counted “terminated” cases as wins for the complainant since an amicable transfer is the typical reason for a case to be terminated.
This doesn’t include numbers for National Arbitration Forum cases since that group doesn’t provide an easy way to sort cases by top level domain.
The only organization to lose a case is Comite Interprofessionnel du vin de Champagne, which failed to get Champagne.co.
A number of .co domains that have been lost in UDRPs could have been saved depending on how the owner used it. Consider Volt.co, TGV.co, and BackCountry.co, for example.
Still, it’s clear that a number of people made (unwise) decisions to register trademarks in .co to take advantage of typo traffic.