I was there May 25 to May 29 last year (Memorial Day weekend) and while it wasn't holiday busy, it wasn't quiet either. I attributed it mostly to being a weekend and only a few weeks after the start of the 25th Anniversary festivities the month before. Having said that, even with Pirates still down and Big Thunder still suffering some growing pains after its long refurb resulting in it being down most every day, the longest I experienced for Phantom Manor was ~50 minutes and Space Mountain topped out around 60. I think the longest wait we had the whole 4 days was 70 minutes for Peter Pan mid-afternoon one day.