I am sure if they take this same survey after another North Korean provocation that the results will probably be different:
Koreans place the least priority on the alliance with the U.S. when it comes to ensuring lasting peace on the peninsula, a survey shows. The survey was conducted by the Ministry of Patriots and Veterans Affairs to mark the 60th anniversary of the armistice that ended the Korean War.
Bolstering awareness of national security was top of the list with 47.7 percent, followed by cooperation with North Korea with 46.8 percent, and strengthening self-defense with 44.6 percent.
Next came achieving diplomatic balance with the U.S., China, Russia and Japan with 27.1 percent. Only 20.4 percent said the most important thing is strengthening the alliance with Washington.
“Anti-American sentiment has worsened” since the deaths of two schoolgirls under a U.S. military vehicle in 2002, said Yoon Duk-min at the Korea National Diplomatic Academy. “It seems that the rise of China and the need to strengthen self-defense impacted public consensus.” [Chosun Ilbo]
You can read more interesting Gallup survey results at the link such as the majority of Koreans (54.3%) think the two countries will be reunified within 20 years.