Today marks the opening of the Glendale branch of Din Tai Fung, the famous Taiwan-based soup-dumpling chain, which will finally give Glendale something in common with Shanghai, Tokyo, Hong Kong -- and Arcadia, where two restaurants, one next door to the other, have drawn hordes of xiao long bao fans since the first one opened a decade or so ago. Some people think Din Tai Fung makes the best soup dumplings in California, if not in the observable universe. Others are more muted in their reactions.