I love Dr. Sears. When my oldest son was a couple of months old I found a copy of his The Baby Book and felt like I had found a kindred spirit in parenting. I remember reading a part in his book about how unnatural it was for us to put our babies in carriers, swings and strollers. He spoke of babies cuddled by plastic rather than loving arms. He also talked about how these devices tend to contain a baby and restrict their movement, thus leading to delays in their natural development.
Surprise, surprise, it turns out that he was right. Why do we always have to wait for evidence (ie screwed up human beings) to accept good advice? I’m just saying.
And for what it’s worth, I generally gave my kids lots of “tummy time” and my oldest and youngest walked at 9 and 10 months respectively. Then again, that may make you want to pull out the bouncy seat after all 🙂