Anyone know why this past SAT question is correct?

Roma1231
Sat, 01 Oct 2011 13:56:11 +0000

Because this sentence:
“The crowds that flocked to the world’s fair in New York in 1895 were larger and more enthusiastic ‘in comparison to those at the World’s Fair in Paris’ had been a few years earlier” is gramatically incorrect. Read it out loud; it’s really awkward.