We were in WDW last year the for the week leading into President's Day weekend (Sat through Sat). We found the crowd level pleasant until Thursday, when the MK was all of the sudden VERY crowded. We have a low tolerance for crowds, so perhaps it didn;t seem quite as crowded for others, but the diffrence between that Tuesday at the MK and thatr Thursday was dramatic.
We spent our last day -- the Saturday of President's week -- at Epcot, which was surprisingly pleasant as dar as the crowds were concerned.
So enjoy until Thursday, when I believe that the real crowds start arriving, and then plan your days for high volume touring. (And perhaps try Epcot one of those days).
-- Annie