By Gianluca Lo Nostro (Reuters) -Dutch payments group Adyen reported better-than-expected quarterly revenue on Wednesday, driven by robust retail transactions that offset concerns over the end of the U.S. tariff exemption for low-value imports. Shares of Adyen surged nearly 10% in early Amsterdam trading, ranking among the top performers on Europe's benchmark STOXX 600 index. The company posted net revenue of 598.4 million euros ($697.9 million) for the third quarter, a 23% year-on-year rise on a consta ...