My experience with the 990's signal acquisition is a significant improvement from the 1050 and 950 - both had signal acquisition times that were very noticeable (the 950 was to the point that I had to leave the cable box set to analog inputs to keep my wife from tearing her hair out when channel surfing). The 990's signal acquisition seems to hover between invisible (primarily with cable TV sources, where the cable box itself creates an unavoidable delay) and occasionally detectable for those who know about signal acquisition (depending on the disc, there may be strong audio from the very first moment that a disc menu / title / first track loads that can help reveal the acquisition process). I guess that a lip sync delay setting could exascerbate this, but I haven't noticed when experimenting with delay (my DVD input has some delay set for my Yamaha, but I watch most DVD's on my Oppo these days).