When I'm home on the weekends, DS gets ~1h a day, one show in the AM, one in the PM. Like mini-Mashi, he's normally running around, playing with cars, or doing little dude stuff.
DH works from home and takes care of DS, and I know DS probably gets exposed to more tv. I don't like it, DH knows that too much tv is bad, but I pick my battles: a non-nagging wife for DH = a happier DH for me
On the positive side of this: Aaron has learned A LOT from the shows he watches, especially his vocab. So, I don't see it bad per se; just in moderation.