I kept my son (and intend to keep my second) rear-facing until he was 2. I understand safety fears but I would feel uncomfortable keeping them turned around beyond that as it inhibits the same level of communication/interaction as when they're forward facing (in my mind anyway - I wonder if there's any research on this matter?) We spend so much time in our cars in this country that it's important we continue to build on our relationships and communication skills while we're on the road. There are other safety issues as important as rear-facing carseats - how about talking on the cellphone or being sleep-deprived (as many parents of small children are) or multi-tasking/drinking and eating while driving. We could put our children in a bubble in the name of safety but we all know that wouldn't be good for them. Let's not isolate our children in the name of safety for another 2 years of their lives.