Opinion polls score much-needed Dutch election win

By John Geddie and Philip BlenkinsopLONDON/AMSTERDAM (Reuters) - Dutch election results eased investor concerns on Thursday that opinion polls were systematically underestimating the strength of populist feeling, especially in France, after an outcome broadly in line with surveys of voter intentions.Pollsters had been chastised for not capturing an anti-establishment upsurge before 2016's Brexit vote and Donald Trump's U.S. election, even though both results were within a reasonable margin of er