I have a 7 month old and a 2 year old. My 2 year old has been fascinated with movies for a long time...and I mean real two hour movies. Not cartoons. He's allowed to watch movies, but I primarily let him watch educational programs. When he first started watching TV, I limited it to Baby's First TV. (Paid programing - educational TV for kids - I love this channel. It offers all sorts of programing and stuff for parents, too. ie. exercising with babies, sing alongs, reading, Spanish, etc. It's on 24 hours and is structured with morning and evening activities.) I have to say he was about 3 or 4 months when he first watched TV. But he was never all that into it...he only watched a little at a time.
He does not watch TV all day. His TV time is monitored. We fill his days with physical play, social time, lots of reading, quite time and free play time.
My son's passion are books. We probabaly spend a couple of hours a day reading. He also tries to memorizes books so that he can read them back to himself. So, I have no problem letting him watch a little TV everyday.
Our TV is not on most of the day. When it is on he ignores unless it's on for him to watch something. He does not have ADD/ADHD and is not overweight.
While we have worked with him in teaching him the alphabet, numbers, colors, shapes, etc. I know that educational TV has ceratinly helped him learn and retain the information.
My point in telling you all this is that moderation and knowing your child is key. If your kid is a vegetable in front of the TV, I'd say that's a problem. I think educational and interactive television can be a good learning tool. I am fortunate that my son has other interests. I do not believe that the American Academy of Pediatrics is the say all to everything. I do a lot of reading and I have read articles about how bad TV can be, and others that say the opposite. In fact the most recent article I read was in Parenting or Parents magazine, stating that some educational TV is not harmful. I had also read that the link between TV and ADD/ADHD is simply because children with ADD/ADHD are drawn to television and seem to like it more than kids without ADD/ADHD. (I have to find that article.) The Academy is there for guidance. At the end of the day it's our responsibility to know our children and what works for them, as well as being involved in what they do including watching television TOGETHER.
My 7 month old only likes one thing on Baby's First TV...so far, he doesn't care too much for it.
I offer you my experience and opinion. I too had struggled with this issue, and did my own research to come to terms with how I monitor my children's television time and feel good about it.
Best of luck,
S