Internationalization process theories have been dominated by the Uppsala theory and the new venture theory: they provide explanations for slow international growth by mature firms and fast international growth by young firms, but fail to consider other combinations of age and speed. This article sketches a 2*2 matrix and explores the performance differentials of four internationalization patterns. Building on early empirical evidence from the retailing industry (1998-2004), the combination of young and slow internationalization is preferable to other options, while a young age is generally more likely to yield internationalization performance than any combination of mature internationalization with slow or accelerated speed.