It seems Cheryl Cole has succeeded in giving a great impression to Fox executive in the US of her judging skills — among her multitude of talents — as she has been described by them as a terrific judge. 

It is widely known — or speculated — that Cheryl is to join Simon Cowell in the judging panel of the upcoming US version of the X Factor. However, the folks who run the show, which is on schedule to launch later in the year, have not confirmed or deny it. 
Speaking to Access Hollywood, the chairman of the network praised Cheryl Cole for her excellent work in the British X Factor. He also said that Cheryl and Simon have a great chemistry. 
Another thing that is certain, Simon adores Cheryl as they are becoming quite the good friends. But ultimately, the decision may not lies solely on his fondness toward Cheryl. The network executive would want to ensure that the judge can be well received by the US audience, which — of course — have different taste than their British counterpart.