Originally Posted by MIT_SBM

If the previous posters are correct about the root cause, the transmission of the data stream is the limiting factor, not the speed of the internals of the receiver/TV. That is to say, if it takes several seconds of data transmission time to collect enough information to build the picture then the delay in switching channels will always be those several seconds regardless of how fast the receiver/TV can process the received data. To put it another way - having a 'faster' TV will not decrease the [perceived] channel change time IF the data transmission speed is the limiting factor.