Audio lag problems unnoticed before

Here is an odd thing. Ever since I have installed my Philips HTS3544 and discovered that the digital audio from TV broadcasts needs to be synced with the video I started to notice that the audio lag is present in many programs even when I simply view them on my Sharp SH12U. Even on the analog channels! There is a chance that somehow this is a problem with the television, but I don't think so. Apparently, home theaters really amplify, so to speak, the lagging by channeling the sound through surround speakers.