Emphatically so. This idiom is an interjection used to stress agreement, as in Did you enjoy the play?—And how! it was wonderful. It probably originated as a direct translation of the German Und wie! [1920s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.