One link says that kids learn less from TV programs than they do from equivalent live presentations (ie engagement with mum it dad teaching then the same thing). Well duh. The problem is - it doesn't take into account that parents can not engage with their kids teaching them things 24/7... It doesn't go into whether or not 30 minutes of Sesame Street is more or less beneficial than bub eating the cat biscuits or dog poo because mum is busy cooking dinner.
The other article says there's not enough evidence to say young bubs learn from TV and it may possibly be harmful. Not really a convincing read.
I think I will risk the 30 minutes of my bub watching Sesame Street or his baby einstein DVD... Worst case scenario it's slightly less productive than eating cat biscuits - I figure though bub will still end up with an equivalent amount of brain cells though considering he was breastfed and the research shows that's beneficial too 1-1 = 0.