If not, I bet you have not watched ESPN or Star Sports in the last week or so. Because these channels have been running a huge announcement logo beginning in the top left and working its way down. It encroaches so much real estate that your local cable-wallah might feel a little embarrassed if he did that to show ads.
It is either a sign of desperation or inanity, for these channels are usually viewer-friendly. But now football scores on the top right are painted over. You cannot tell what a tennis ball is doing on the left hand side of the court.
Why not put the logo in the middle and have a little inset on the top left for the sports?