I was actually surprised at how slow the tests were done, seeing the results. Seriously, many accidents happen at a much greater speed than the 30-40 mph range. Just imagining what would happen if they upped the speed makes me wonder. Last summer my car was T-boned by a truck going 40 mph. I was fortunate that the spot it hit was where I was sitting in the back seat and not where my son was sitting. His toddler seat did what it was supposed to do and he only suffered minor cuts from the broken glass. But thinking about if we had been in opposite seats scares the hell out of me. I came out of it hurt but not so much I had to go to the hospital. My son could have faired worse.
Add in the thought of a car seat for an infant and no test can ever be too ridiculous when trying to determine if it does the job its made for.