I remember almost no network logos on the screen. There was also this period of time, maybe the first two months or so, where everything on PBS HD was new for you and then after that you had seen everything they had to offer.
It is better today but I wish the networks would push it in a bit more. I have one TV that the overscan only goes to about 4 or 5% on on the edges and part of the D is still cut off. On my other one it is fine now.