Recently, the anomalous dimension of twist two operators in Script N= 4 SYM theory was computed by Gubser, Klebanov and Polyakov in the limit of large't Hooft coupling using semi-classical rotating strings in AdS 5. Here we reproduce their results for large angular momentum by using the cusp anomaly of Wilson loops in Minkowski signature also computed within the AdS/CFT correspondence. In our case the anomalous dimension is related to an Euclidean world-sheet whose properties are completely determined by the symmetries of the problem. This gives support to the proposed identification of rotating strings and twist two operators.