in the years since 1993 that i have been vacationing in orlando, i have found most people start and end their vacations on a weekend.
with that in mind, most do mk when first at the parks.
people then tend to migrate to UO after the first few days after disney.
i have found doing UO on a monday very beneficial with less crowds.
since i have long past stayed off site, and only stay on site, i still find mondays a low crowd day until noon time.
last year on columbus day (monday) i was at the park until 2:00 in the afternoon and did not see much on lines. i was at UO side that date not IOA